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Guibos and Flex Discs

Find BMW driveshaft and axle shaft parts, including flex discs (aka: the guibo) is a vibration dampener mounted on the back of the transmission. The flex disc acts as a buffer between the transmission's output shaft and the driveshaft leading back to the car's differential. Visual inspection is the only way to tell if the disc is beginning to wear. Cars with worn discs will notice a harsh vibration when starting from a stop and the disc should be replaced (along with the center support bearing) ASAP.
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IRP - Individual Racing Parts - Corporate Logo
T#:401430
Part#: IRPFD-78-12
In Stock
$ 123.99 USD
Free Shipping
$ 123.99 USD
Free Shipping

Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

78mm Diameter with fitment for M12 nuts/bolts.

Applicatons: 
1992-1998 E36 BMW 318i 318is 318ti 318ic - Manual Transmission 
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic - Manual and Automatic Transmission 
1992-1998 E36 BMW 328i 328is 328ic - Automatic Transmission 
1999-2005 E46 BMW 323i 323ci 325i 325ci - Manual Transmission 
1997-2002 Z3 BMW Z3 1.9 - Manual Transmission 
1999-2000 Z3 BMW Z3 2.3 M52TU - Manual and Automatic Transmission 
2001-2002 Z3 BMW Z3 2.5i - Manual Transmission 
1997-4/1999 Z3 BMW Z3 2.8 - Automatic Transmission 
2003-2006 Z4 BMW Z4 2.5i - Manual and Automatic Transmission 

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IRP - Individual Racing Parts - Corporate Logo
T#:401428
Part#: IRPFD-96
In Stock
$ 165.00 USD
Free Shipping
$ 165.00 USD
Free Shipping

Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

96mm Diameter

Fits the following BMWs:
2008+ E82 BMW 128i
5/1986-1991 E30 BMW 325e 325es M3 - Manual Transmission 
1987-1991 E30 BMW 325ix - Between Transmission & Transfer Case
1996-1998 E36 BMW 328i 328is 328ic - Manual Transmission only 
1999-2005 E46 BMW 323i 323ci 325i 325ci - Automatic & SMG Transmissions only 
1999-2005 E46 BMW 328i 328ci 330i 330ci - Manual, Auto, and SMG
2006+ E90 BMW 325i 328i 330i - Manual or Automatic Transmission 
2006+ E91 BMW 328i - Manual or Automatic Transmission 
2007+ E92 BMW 328i - Manual or Automatic Transmission 
2007+ E93 BMW 328 - Manual or Automatic Transmission 
1982-1983 E28 BMW 528e - Manual Transmission
5/1986-1988 E28 BMW 528e - Manual Transmission
1982-1988 E28 BMW 533i 535i 535is M5 - Manual Transmission 
1991-1995 E34 BMW 525i - Automatic Transmission
1989-6/1992 E34 BMW 525i - Manual Transmission
1993-1995 E34 BMW 530i - Manual or Automatic Transmission
1989-1993 E34 BMW 535i - Manual Transmission
2001-2003 E39 BMW 525i - Automatic Transmission
1997-2003 E39 BMW 528i 530i - Manual or Automatic Transmission 
1980-1989 E24 BMW 633csi 635csi M6 - Manual Transmission
2000-2006 E53 BMW X5 3.0i - for Rear Driveshaft
2000-2003 E53 BMW X5 4.4i X5 4.6is - for Rear Driveshaft
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive48i - for Rear Driveshaft 
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i - Automatic Transmission 
1997-2002 Z3 BMW Z3 2.8 Z3 3.0i - Manual or Automatic Transmission 
2003-2008 Z4 BMW Z4 2.5i - Automatic or SMG Transmission
2003-2008 Z4 BMW Z4 3.0i Z4 3.0si 

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IRP - Individual Racing Parts - Corporate Logo
T#:401427
Part#: IRPFD-110
Special Order: No Guaranteed ETA
$ 178.99 USD
Free Shipping
$ 178.99 USD
Free Shipping

Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

110mm Diameter

This item fits the following BMW Chassis: 
E60 M5,E63 M6,E63,E90,E92,E93 

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Revshift - Corporate Logo
T#:1105931
Part#: PFX-7812
Special Order: No Guaranteed ETA
$ 149.99 USD
Free Shipping
$ 149.99 USD
Free Shipping
FOR RACE USE ONLY! This race flex disc is the small 78mm with 12mm bolt holes. It is commonly found on non-M E36 and E46 vehicles with a manual transmission. The Revshift race flex disc frame is made from 6061 aluminum with type III hard anodizing and utilizes high-quality polyurethane bushings to maximize stiffness and strength while maintaining an appropriate amount of flex. FOR RACE USE ONLY! This part is very rigid and requires precise installation. The driveline must be properly aligned and all driveline components must be in good condition and properly balanced. The engine mounts, trans mounts, differential bushings, and subframe bushings must all be rigid to prevent driveline movement. We recommend a hardness of 95a or higher for these components. A new center support bearing and driveshaft centering bushing are also recommended. Features: 6061 aluminum frame with type III hard anodizing 95A polyurethane bushings Replaces OEM part # 26111227410 (LK=78mm/12mm) Rebuildable using one of our flex disk rebuild kit Revshift Performance Engineering is a high-performance parts manufacturer with a focus on quality, reliability, and performance. Utilizing high-precision machining technologies and their very own Polyurethane Manufacturing Department, every Revshift product is designed, manufactured, and tested in-house at their Detroit, Michigan facility.
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Revshift - Corporate Logo
T#:1105929
Part#: PFX-24V
Ships in 7 Business Days
$ 149.99 USD
Free Shipping
$ 149.99 USD
Free Shipping
FOR RACE USE ONLY! This flex disc is for a 1983-1991 E30 BMW 3-series with an M50/M52/S50/S52 engine swap. It adapts the 96mm/12mm ZF transmission flange to the 78mm/10mm E30 driveshaft. It allows you to retain the oem 325i driveshaft when doing a 24v engine and ZF transmission swap. (Not compatible with the 4-cylinder driveshaft) The Revshift race flex disc frame is made from 6061 aluminum with type III hard anodizing and utilizes high-quality polyurethane bushings to maximize stiffness and strength while maintaining an appropriate amount of flex. FOR RACE USE ONLY! This part is very rigid and requires precise installation. The driveline must be properly aligned and all driveline components must be in good condition and properly balanced. The engine mounts, trans mounts, differential bushings, and subframe bushings must all be rigid to prevent driveline movement. We recommend a hardness of 95a or higher for these components. A new center support bearing and driveshaft centering bushing are also recommended. Features: 6061 aluminum frame with type III hard anodizing 95A polyurethane bushings Enables use of oem driveshaft Rebuildable using one of our flex disk rebuild kits Revshift Performance Engineering is a high-performance parts manufacturer with a focus on quality, reliability, and performance. Utilizing high-precision machining technologies and their very own Polyurethane Manufacturing Department, every Revshift product is designed, manufactured, and tested in-house at their Detroit, Michigan facility.
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Revshift - Corporate Logo
T#:1105930
Part#: PFX-7810
Ships in 7 Business Days
$ 149.99 USD
Free Shipping
$ 149.99 USD
Free Shipping
FOR RACE USE ONLY! This race flex disc is the small 78mm with 10mm bolt holes. It is commonly found on E30 vehicles with an automatic or manual transmission (excluding the M3 and 325E). The Revshift race flex disc frame is made from 6061 aluminum with type III hard anodizing and utilizes high quality polyurethane bushings to maximize stiffness and strength while maintaining an appropriate amount of flex. FOR RACE USE ONLY! This part is very rigid and requires precise installation. The driveline must be properly aligned and all driveline components must be in good condition and properly balanced. The engine mounts, trans mounts, differential bushings, and subframe bushings must all be rigid to prevent driveline movement. We recommend a hardness of 95a or higher for these components. A new center support bearing and aft centering bushing are also recommended. Features: 6061 aluminum frame with type III hard anodizing 95A polyurethane bushings Replaces OEM part # 26111225624 (LK=78mm/10mm) Rebuildable using one of our flex disk rebuild kits Revshift Performance Engineering is a high-performance parts manufacturer with a focus on quality, reliability, and performance. Utilizing high-precision machining technologies and their very own Polyurethane Manufacturing Department, every Revshift product is designed, manufactured, and tested in-house at their Detroit, Michigan facility.
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Revshift - Corporate Logo
T#:1105933
Part#: PFX-9612
Ships on Sep 23, 2026
$ 149.99 USD
Free Shipping
$ 149.99 USD
Free Shipping
FOR RACE USE ONLY! This is the large 96mm race flex disc with 12mm bolt holes. It is commonly found on the E30, E36, and E46 M3, as well as a wide range of other vehicles. Please refer to the cross-reference below. The Revshift race flex disc frame is made from 6061 aluminum with type III hard anodizing and utilizes high-quality polyurethane bushings to maximize stiffness and strength while maintaining an appropriate amount of flex. FOR RACE USE ONLY! This part is very rigid and requires precise installation. The driveline must be properly aligned and all driveline components must be in good condition and properly balanced. The engine mounts, trans mounts, differential bushings, and subframe bushings must all be rigid to prevent driveline movement. We recommend a hardness of 95a or higher for these components. A new center support bearing and driveshaft centering bushing are also recommended. Features: 6061 aluminum frame with type III hard anodizing 95A polyurethane bushings Replaces OEM part # 26117511454 and part # 26112226527 (LK=96mm/12mm) Rebuildable using one of our flex disk rebuild kits Revshift Performance Engineering is a high-performance parts manufacturer with a focus on quality, reliability, and performance. Utilizing high-precision machining technologies and their very own Polyurethane Manufacturing Department, every Revshift product is designed, manufactured, and tested in-house at their Detroit, Michigan facility.
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Revshift - Corporate Logo
T#:13957878
Part#: PFX-105BB
In Stock
$ 249.99 USD
Free Shipping on orders $49 and up
Revshift's race flex disc frame is made from 6061 aluminum and utilizes high-quality polyurethane bushings to maximize stiffness and strength while maintaining an appropriate amount of flex. The driveline must be properly aligned and all driveline components must be in good condition and properly balanced. The engine mounts, trans mounts, differential bushings, and subframe bushings must all be rigid to prevent driveline movement.
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IRP - Individual Racing Parts - Corporate Logo
T#:401429
Part#: IRPFD-78-10
Ships in 7 Business Days
$ 123.99 USD
Free Shipping
$ 123.99 USD
Free Shipping

Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

78mm Diameter with fitment for M10 nuts/bolts.

Fits the following BMWs:
1977-1983  E21  - 320i 
1983-5/1986  E28  - 528e - Manual Transmission 
5/1986-1988  E28  - 528e - Manual or Automatic Transmission 
1984-1991  E30  - 318i, 318is, & 318ic 
1984-1986  E30  - 325e/es (thru 04/1986) 
1986-1991  E30  - 325i, 325is, 325ic 
1987-1991  E30  - 325ix 
1992-1997  E36  - 318i 318is 318ic - For Automatic Transmission only 
1996-1998  Z3  - Z3 1.9 liter roadster

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