E21-Engine

Fuel starvation in high g corners, especially below a half tank, can be a major problem on track with your E30 or E36. This problem has now been s...

A popular upgrade on BMWs is to switch from a 3" MAF to a 3.5". The 3.5" MAF can be found on 540i, 740i and some porsche models. To accomplish thi...

We recommend this relay harness for wiring in single or dual high flow fuel pumps. This harness was built with the BMW 3-series in mind.  Wires ar...

We never stop looking for the best possible products for your car. Having a magnetic drain plug for your oil is essential in not only alerting you...

We never stop looking for the best possible products for your car. Having a magnetic drain plug for your oil is essential in not only alerting you...

Are you adding a custom exhaust to your BMW or repairing your old one?  You might need to add a custom O2 sensor exhaust bung.  These high quality ...

Looking to have your BMW fuel injectors rebuilt but don't think you have the tools or are up to the task?  No problem.  We are now offering an inje...

If you are trying to install a cold air intake on an older BMW that has a M20, M30, or M42 you may find it difficult has the MAF is square, and mos...

This aluminum heat tape is flexible with a super strong adhesive backing. This will thermal insulate up to 2000 degrees F. Made of one mil aluminiz...

Have a tight clearance on your headers?  The stock copper exhaust nuts can cause issues on some aftermarket headers and turbo manifolds.  Our low p...

There are many reasons you may want to convert your rubber fuel line to an AN system, and this adapter makes it a breeze.  Add an aftermarket fuel ...

When I first used this product, I thought it was magic. Originally developed for the US military, this self sealing tape is a must to keep in your...

If you are installing aftermarket headers, or a turbo manifold, it is most likely the stock exhaust studs will be too short.  Our extended exhaust ...

Our high quality 3" silicone couplers are perfect for attaching cold air intakes to your MAF sensor. These couplers are made from 4 ply reinforced ...

If you're looking for stiffer motor mounts for your M10 E30 (318), this is it. We have used and tested all different types of bushings over the yea...

Attaching the oil drain line on our turbo can be a challenge.  Because of this, Rally Road created an extended turbo oil drain fitting to make it e...