IRP - Individual Racing Parts BMW Drivetrain Parts

Stock mounts are made from soft rubber and are sometimes filled with fluid to give a car the most comfortable ride possible. The soft rubber and fluid helps to reduce the total amount of vibration, noise, and harshness (NVH) that is transferred into the cabin. The problem with this is driveline slop. The stock mounts allow a lot of excess movement and increases the amount of time it takes to transfer power to the wheels.

In order to address this issue, performance mounts can be substituted to reduce the amount of slop and transfer power to the wheel quicker. Two options for this are polyurethane mounts and solid mounts.

Solid mounts are great for an immediate transfer of power but allow for a ton of noise and vibration to be felt and heard in the cabin of the vehicle. This is great for the track where there aren't any issues with excess harshness, but as a daily driver, this can become an annoying pain in the neck.

The best middle ground is Polyurethane. Polyurethane is much stiffer than rubber and gives you the much stiffer feel you may be looking for. This allows for the increase in responsiveness, but isn't so extreme that it transfers all of the sound and vibrations into the cabin. This makes it much more comfortable for daily use while still reinforcing your driveline.

Features:

• Aluminum and Polyurethane Construction
• 80A Durometer Rating
• New Hardware

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 

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

Stock mounts are made from soft rubber and are sometimes filled with fluid to give a car the most comfortable ride possible. The soft rubber and fluid helps to reduce the total amount of vibration, noise, and harshness (NVH) that is transferred into the cabin. The problem with this is driveline slop. The stock mounts allow a lot of excess movement and increases the amount of time it takes to transfer power to the wheels.

In order to address this issue, performance mounts can be substituted to reduce the amount of slop and transfer power to the wheel quicker. Two options for this are polyurethane mounts and solid mounts. 

The middle ground is Polyurethane. Polyurethane is much stiffer than rubber, but these still let a large amount of movement in comparison to solid mounts. These are great for sporty, aggressive street driving, but for the track are not ideal.

For the track, solid mounts are great. Solid mounts give you an immediate transfer of power, at the cost of increase NVH. This is great for the track where comfort is the least of your worries and power is all that is important.

Features:

• Aluminum and Polyurethane Construction
• 80A Durometer Rating
• New Hardware