BMW F83 M4 S55 3.0L

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

In Stock

$ 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

Only 2 available at this price

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

Supertech Single Groove Intake Valve - Set Of 12

T#:14783498

Part#: BMIVN-1055S-12

Ships in 9 Business Days

$ 310.99 USD

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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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$ 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 7 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

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$ 197.99 USD

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$ 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 6 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

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$ 660.99 USD

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$ 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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$ 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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Performance Conical Valve Spring - Set Of 24

T#:21604325

Part#: SPR-FE20BE-2-24

Ships in 9 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 9 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 9 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 9 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 9 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 9 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 17, 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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$ 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

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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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Sub-Categories

Supertech Single Groove Exhaust Valve - Priced Each

5mm Single Groove Valve Keeper - Set Of 24

Supertech Single Groove Intake Valve - Set Of 12

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

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

Supertech Titanium Valve Retainers - Intake - Set Of 12

Supertech Titanium Valve Retainers - Exhaust - Set Of 12

Conical Spring Kit - Set Of 24

Supertech Single Groove Exhaust Valve - Set Of 12

Supertech Forged Pistons - Set Of 6

Forged Connecting Rods - Sold Each

Performance Conical Valve Spring - Sold Each

Performance Conical Valve Spring - Set Of 24

Supertech Single Groove Intake Valve - Priced Each

Performance Conical Valve Spring - Set Of 24

Supertech Titanium Valve Retainers - Intake - Sold Each

Supertech Titanium Valve Retainers - Exhaust - Sold Each

Performance Conical Valve Spring - Sold Each

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

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

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

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

Akrapovic Sound Kit - F8X BMW M3 & M4

5mm Single Groove Valve Keeper - Priced Each

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