BMW F83 M4 S55 3.0L

AeroCatch Racing Hood and Body Panel Fasteners (Pair) - Better than h...

T#:340098

Part#: AEROCATCH

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$ 566.99

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05-13-2026

Starting at $ 82.99 USD

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As used by Turner Motorsport on our championship winning BMW race cars, the new aerodynamically efficient and aesthetically styled AeroCatch is setting new standards in hood fixing for the 21st century. Say goodbye to your standard hood pins -- these are better all around.

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Supertech Single Groove Exhaust Valve - Priced Each

T#:21472889

Part#: BMEVI-1055S-HS

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$ 55.99 USD

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Single Groove sodium filled exhaust valves for high performance builds Head Diam: 28mm (std) Material: Inconel-Nimonic / Sodium Filled Groove Type: Single Groove Length: 112.9mm Stem Diam: 5.96mm

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5mm Single Groove Valve Keeper - Set Of 24

T#:21604314

Part#: KPR-5.0-7S-24

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$ 72.99

This product was last offered at the strikethrough price on
08-12-2026

$ 67.99 USD

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$ 72.99

This product was last offered at the strikethrough price on
08-12-2026

$ 67.99 USD

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Two required per valve, for use with certain supertech valves 5.0mm single groove

BFI Center Cap Adapters For BBS E88 Wheels - Brushed - Set of Four ...

T#:31158762

Part#: WBFI77-E88-501

Ships on Sep 24, 2026

$ 229.99 USD

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BFI Center Cap Adapters For BBS E88 Wheels - Brushed - Set of Four are designed to enhance the appearance of BMW's BBS E88 wheels by covering the open center hole with a sleek, brushed finish. These adapters:

Provide a polished, high-quality look by covering the open center hole
Are machined from 6061-T5611 aluminum for superior strength and durability
Feature a hand-brushed finish for a seamless OEM appearance
Allow the use of 3-prong 70.6mm BBS center caps to add a touch of class
Are sold in sets of four, with center caps not included

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Black Forest Industries Billet Heavy Weight Shift Knob - Alcantara Or...

T#:391722

Part#: GS2B

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Starting at $ 184.99 USD

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This weighted shift knob makes shifts faster and the extra-large globe shape encourages over-palm shifting. The Black Forest Industries Billet Knob weighs in at 8.8oz (250g), about twice as much as a stock knob and a little heaver than the BMW ZHP knob. The heavier knob amplifies the pendulum motion of the shift lever resulting in smoother and faster shift times. BFI has designed this knob for BMW and VW fitments to fit snug on the shift lever and be secured with Allen set screws. They were careful to reduce tolerances compared to universal knobs. The overall height of the BFI knob is the same as stock anatomic knobs (some BMW M/Performance models have a stock knob that is shorter than this one).

Included with the BFI Billet knob is a matching BFI crest shift emblem. A 5 or 6-speed pattern emblem is available separately.

Choose from soft alcantara or perforated air leather with either a silver or black anodized base.

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Supertech Single Groove Intake Valve - Set Of 12

T#:14783498

Part#: BMIVN-1055S-12

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$ 310.99 USD

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Head Diam: 32mm (std) Material: Stainless Steel 21-4N Groove Type: Single Groove Length: 104.9mm Stem Diam: 4.97mm

Akrapovic Slip-On Titanium Exhaust System - Titanium Or Carbon Fiber ...

T#:9383747

Part#: M-BM/T/8HKTPDK

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Starting at $ 7,034.99 USD

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Starting at $ 7,034.99 USD

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This axle-back exhaust system is manufactured entirely from titanium. This makes this system ideal for cutting weight while being structurally stronger than the OE exhaust system. The engineers at Akrapovic have retained the dual mode exhaust flap control from the original system. This allows the vehicle to have a more civilized, but deeper than stock sound at low speed. However, at higher RPM (or when selecting the S mode on the gearshift) the muffler is bypassed, creating a deep and sporty sound much more in keeping with the personality of the car. The included exhaust pipe tips are made completely from titanium OR a carbon fiber/titanium composite to add a high-end, refined style. Performance has not been left out of the design. The system dramatically reduces backpressure and is an excellent starting point for further engine tuning or turbo modifications. Even when installed on an otherwise stock vehicle a gain of 7.3 horsepower and 17.4 Nm/12.8 lbs-ft of torque are achieved. Furthermore, a weight reduction of 3.0 kg/6.6 lbs. is realized. The OEM catalysts are retained, so no reflashing of the ECU is required and the check engine light will not be triggered. Titanium muffler with integrated exhaust valves Statistics: +7.3 HP (at 4400 rpm) +17.4 Nm/12.8 lbs-ft of torque (at 2350 rpm) 3 kg/6.6 lbs. lighter than stock Not for sale outside the US or Canada.

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Performance Dual Valve Spring Kit with Steel Retainers - Set Of 24 ...

T#:21604308

Part#: SPRKFE20N54BE

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$ 965.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Can be used with factory valve stem seals and keepers. InnSpr.OD: 21mm InnSpr.ID: 14.2mm Seat Pressure: 75 @ 36.5 Open Pressure: 155 @ 10 Max Lift: 12mm Coil Bind: 23.2mm Rate: 8 Kit spring: SPR-FE20BE Kit spring qty: 24 Retainer: RET-BMN54-TI (5mm) / RET-BMN54-TE (6mm) OutSpr.OD: 24.4mm OutSpr.ID: 17.6mm Retainer qty: 24

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Supertech Titanium Valve Retainers - Intake - Set Of 12

T#:21604322

Part#: RET-BMN54-TI-12

Ships in 6 Business Days

$ 197.99 USD

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7 Degree - 5mm valve stem - Single or Tripe Groove Valves

Supertech Titanium Valve Retainers - Exhaust - Set Of 12

T#:21604321

Part#: RET-BMN54-TE-12

Ships in 6 Business Days

$ 197.99 USD

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7 Degree - 6mm valve stem - Single or Tripe Groove Valves

Conical Spring Kit - Set Of 24

T#:21604309

Part#: SPRKFE20N54BE2

Ships in 5 Business Days

$ 965.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Can be used with factory valve stem seals and keepers. InnSpr.OD: 21mm InnSpr.ID: 14.2mm Seat Pressure: 88 @ 36.5 Open Pressure: 160 @ 10 Max Lift: 12mm Coil Bind: 23.2mm Rate: 7.25 Kit spring: SPR-FE20BE-2 Kit spring qty: 24 Retainer: RET-BMN54-TI (5mm) / RET-BMN54-TE (6mm) OutSpr.OD: 24.4mm OutSpr.ID: 17.6mm Retainer qty: 24

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Supertech Single Groove Exhaust Valve - Set Of 12

T#:14816646

Part#: BMEVI-1055S-HS-1

Ships in 4 Business Days

$ 660.99 USD

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Single Groove sodium filled exhaust valve set for high performance builds Head Diam: 28mm (std) Material: Inconel-Nimonic / Sodium Filled Groove Type: Single Groove Length: 112.9mm Stem Diam: 5.96mm

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Supertech Forged Pistons - Set Of 6

T#:21604329

Part#: P6-BMN55-84-T-6

In Stock

$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD

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$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD

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Supertech forged pistons are a great choice for performance engine builds! Bore: 84.00mm Over Size: STD Comp Ratio: 10.2:1 Dome dish: -10.4 Head CCs: 37cc Comp Height: 32.40mm Stroke: 89.60mm Skirt style: Slipper Design Rod Length: 141.35mm Pin Diam: 22mm Material: 4032 Application: All Motor / Turbo Ring part number: R84-GNH8400 (MUST BE PURCHASED SEPARATELY)

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Forged Connecting Rods - Sold Each

T#:21604327

Part#: CR-BMN55-H144.35

In Stock

$ 198.99

This product was last offered at the strikethrough price on
05-03-2026

$ 184.99 USD

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$ 198.99

This product was last offered at the strikethrough price on
05-03-2026

$ 184.99 USD

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Supertech forged rods are a great choice for performance engine builds! These rods come with ARP 2000 hardware and are designed for high powered N55/S55 applications. H-Beam design Forged 4340 alloy Center to center: 144.35mm Be bore: 53.6mm Be width: 20.88 Pe bore: 22mm full float Pe width: 20.88mm tapered ARP 2000 - 3/8" x 1.600" bolts

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Performance Conical Valve Spring - Sold Each

T#:21472894

Part#: SPR-FE20BE

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$ 19.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 75 @ 37 Open Pressure: 155 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm Rate: 8 OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm

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BFI GS1 Billet / Air Leather Shift Knob - Black / Gold - BMW Fitment ...

T#:50934273

Part#: GS1-70101-4

Ships on Sep 24, 2026

$ 164.99 USD

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The Black Forest Industries GS1 shift knob is engineered specifically for the BMW driver who wants a more mechanical connection to their transmission.

Extended Wheel Bolt - M12x1.5 - 35mm

T#:50899204

Part#: BFI-906-LUG

Ships on Sep 24, 2026

$ 4.99 USD

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$ 4.99 USD

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Specifically engineered for vehicles utilizing a wheel stud conversion.

GS2 Air Leather Shift Knob - Black / Gold Leaf - BMW Fitment ...

T#:50934279

Part#: GS2-70101-4

Ships on Sep 24, 2026

$ 184.99 USD

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Precision meets prestige with the Black Forest Industries GS2 Knob.

Black Forest Industries Engine Mounts - Stage 1 - BMW F8X M2 / M3 / M...

T#:50934268

Part#: BFI-BMW-F8X-M1

Ships on Sep 24, 2026

$ 349.99 USD

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By upgrading to a solid-core poly design, you eliminate the risk of fluid-filled mount failure while gaining a significantly more stable drivetrain platform.

Black Forest Industries Extended Wheel Bolt - M14x1.25 - 40mm ...

T#:50899207

Part#: BFI-905-LUG

Ships on Sep 24, 2026

$ 4.99 USD

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$ 4.99 USD

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Specifically designed for use with 10mm to 15mm wheel spacers to maintain proper thread reach.

Black Forest Industries GS2 Air Leather Shift Knob - Black / Red Leaf...

T#:50934280

Part#: GS2-70101-5

Ships on Sep 24, 2026

$ 184.99 USD

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The GS2 utilizes a solid billet aluminum core to provide a dense, mechanical connection to your transmission.

BFI GS2 Air Leather Shift Knob - Black / Silver Leaf - BMW Fitment ...

T#:50934276

Part#: GS2-70101-2

Ships on Sep 24, 2026

$ 184.99 USD

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The Black Forest Industries GS2 is the ideal choice for the BMW owner who demands both style and substance.

Black Forest Industries GS1 Alcantara Shift Knob - Black / Silver Lea...

T#:50934274

Part#: GS1-BMW-ALC

Ships on Sep 24, 2026

$ 174.99 USD

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Elevate your M-Performance interior with the Black Forest Industries GS1 Alcantara Edition.

BFI GS1 Billet / Air Leather Shift Knob - Black / Silver - BMW Fitmen...

T#:50934271

Part#: GS1-70101-2

Ships on Sep 24, 2026

$ 164.99 USD

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The BFI GS1 is the perfect upgrade for the BMW enthusiast who demands better tactile feedback.

Black Forest Industries GS2 Air Leather Shift Knob - Red / Silver Lea...

T#:50934281

Part#: GS2-70102-1

Ships on Sep 24, 2026

$ 184.99 USD

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Precision meets bold design.

GS2 Air Leather Shift Knob - Blue / Silver Leaf - BMW Fitment ...

T#:50934282

Part#: GS2-70103-1

Ships on Sep 24, 2026

$ 184.99 USD

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This Blue and Silver combination looks incredible in cars with the "M" tri-color stitching on the steering wheel, highlighting the blue thread perfectly.

Performance Conical Valve Spring - Set Of 24

T#:21604325

Part#: SPR-FE20BE-2-24

Ships in 8 Business Days

$ 494.99 USD

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$ 494.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 84 @ 37 Open Pressure: 157 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm Rate: 7.25

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Supertech Single Groove Intake Valve - Priced Each

T#:14783497

Part#: BMIVN-1055S

Ships in 8 Business Days

$ 25.99 USD

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$ 25.99 USD

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Head Diam: 32mm (std) Material: Stainless Steel 21-4N Groove Type: Single Groove Length: 104.9mm Stem Diam: 4.97mm

Performance Conical Valve Spring - Set Of 24

T#:21604324

Part#: SPR-FE20BE-24

Ships in 8 Business Days

$ 471.99 USD

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$ 471.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 75 @ 37 Open Pressure: 155 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm Rate: 8 OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm

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Supertech Titanium Valve Retainers - Intake - Sold Each

T#:21604319

Part#: RET-BMN54-TI

Ships in 8 Business Days

$ 16.99 USD

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$ 16.99 USD

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7 Degree - 5mm valve stem - Single or Tripe Groove Valves

Supertech Titanium Valve Retainers - Exhaust - Sold Each

T#:21604320

Part#: RET-BMN54-TE

Ships in 8 Business Days

$ 16.99 USD

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$ 16.99 USD

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7 Degree - 6mm valve stem - Single or Tripe Groove Valves

Performance Conical Valve Spring - Sold Each

T#:21604306

Part#: SPR-FE20BE-2

Ships in 8 Business Days

$ 20.99 USD

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$ 20.99 USD

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Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 84 @ 37 Open Pressure: 157 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm Rate: 7.25

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SuperTech High Performance Valve Spring Kit - 88lbs - BMW N55 S55 ...

T#:14783500

Part#: SUP-HPVSK-S55-88

Ships on Sep 18, 2026

$ 1,099.99 USD

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$ 1,099.99 USD

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Akrapovic Carbon Fiber Mirror Cap Set - Matte Finish - F8X M3 & M4 ...

T#:559415

Part#: WM-BM/CA/2/M

Back Ordered

$ 990.99 USD

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Carbon fiber mirror caps are an easy and effective exterior accessory. These are made by Akrapovic and are the perfect match to their other carbon trim - muffler tips and rear bumper diffuser. Simply unsnap the original mirror cap and install the new carbon type.

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Akrapovic Carbon Fiber Mirror Cap Set - High Gloss - F8X M3 & M4 ...

T#:567358

Part#: WM-BM/CA/2/G

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$ 1,142.99 USD

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$ 1,142.99 USD

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Carbon fiber mirror caps are an easy and effective exterior accessory. These are made by Akrapovic and are the perfect match to their other carbon trim - muffler tips and rear bumper diffuser. Simply unsnap the original mirror cap and install the new carbon type.

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Akrapovic Carbon Fiber Rear Diffuser - High Gloss Or Matte - F80/82/8...

T#:9416023

Part#: DI-BM/CA/4PDK

Back Ordered

Starting at $ 1,931.99 USD

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Starting at $ 1,931.99 USD

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This rear carbon fiber diffuser will add to the style of your M vehicle, giving it a much sportier and aggressive appearance from the rear. The M3/M4 are great looking vehicles, nearly flawless, but there is always room for improvement! Made from high quality carbon fiber and built for a tight, stock-like fitment, this diffuser is the way to go when you want to add it by itself or when upgrading your exhaust system. This can help performance exhaust tips stand out even greater compared to the stock diffuser. Finish comes in either: High Gloss Matte

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Akrapovic Sound Kit - F8X BMW M3 & M4

T#:557171

Part#: P-HF1100

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$ 1,029.99 USD

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$ 1,029.99 USD

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The Sound Kit is a remote control for the valves on the Akrapovic muffler. While the muffler valves are also controlled like the factory valves in Comfort, Sport, and Sport+ modes, the Sound Kit will let you open or close the valves via handheld remote or even from your phone (iOS or Android app). The Sound Kit works with the existing wiring for the Akrapovic system so installation is a breeze.

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5mm Single Groove Valve Keeper - Priced Each

T#:21604312

Part#: KPR-5.0-7S

Back Ordered

$ 3.99 USD

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$ 3.99 USD

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Two required per valve, necessary use with certain supertech valves 5.0mm single groove

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