E21-Engine

OVER 1000 KITS SOLD! Have low fuel pressure or rough running engine? Have leaks or broken pintle caps? It may be time to rebuild your fuel injector...

*NOW OFFERING EXTENDED STUDS FOR AFTERMARKET HEADERS Installing the OEM exhaust manifold studs can be a real pain. Since the stock studs do not hav...

I believe its almost impossible to remove the injector harness and not lose one of these clips. On top of that, when one pops off, it falls into th...

*NOW OFFERING EXTENDED STUDS FOR AFTERMARKET HEADERS Have you ever gone to remove an exhaust stud and the stud and nut comes out as a pair? Have tr...

Are you looking to push some serious air? There is no denying that BMW does not always have the best cooling systems. In fact one of the first thin...

NEWS! We just upgraded to a top of the line ASNU fuel injector flow bench for the most accuracy and fastest turn around times.  The health of your ...

If you have been following Race German for a while, you know I have an aviation background. Aviation products hold a higher standard for obvious re...

These copper corrosive resistant nuts are the perfect combo for our upgraded exhaust studs. Anytime you change your headers, you should replace you...

These universal BMW injector retainer clips commonly fall into your engine bay where there is no retrieving.  Replace your lost or corroded clips w...

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 80 degree thermostat, you are allowing the coolant to...

Replacing your old, worn out injectors is a very good thing.  Unfortunately, many of these clips are rusted, or get lost in the engine bay.  Good l...

We probably get more questions about how to wire up an electric fan properly than anything else. Because of this, we put together a SPAL EZ fan rel...

This is the correct vacuum hose for your BMW. Do not try to use the standard size (1/8, 3/16, 1/4) vacuum lines from your local automotive store. T...

One of the biggest causes of check engine lights is vacuum leaks. The OEM rubber vacuum line gets brittle from the heat and the cracks cause leaks....

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 71 degree thermostat, you are allowing the coolant to...

Over the years of the engine bay heat cycling, the injector plugs can become worn and brittle.  When this happens, the plugs can break, leaving you...

Poly transmission mounts are a great way to tighten up your shifting experience. We have tested many mounts over the years and believe Revshift mak...

There is no denying that SPAL electric fans are a great upgrade over the stock electric fan or mechanical clutch fun. But purchasing the fan is onl...

Most of the time, the places you need to tap into the oil system aren't in the greatest position. It is usually in a spot that is hard to get to. ...

Hose clamps, hose clamps, we could have a whole discussion on these, but when it comes down to it, the last thing you want to do is use cheap big b...

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...

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...

Changing oil is an inevitable necessity on not just BMWs but all cars. It is not always the most glamorous job, but it must be done. If this is a...

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...

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...

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 ...

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...

If you know you know.  BMW used to this blue braided hydraulic clutch hose on all their cars, but recently superseded it to a generic (lower qualit...

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...

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...

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...

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 ...

This is a common crush copper crush washer gasket used all over the BMW engine. The most used application for this gasket is for the radiator auxil...

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...

When you have to deal with different fuel components, it can be a challenge to stop the fuel flow easily. This is especially true when replacing fu...

The rear main seal on our BMWs commonly leak and should be replaced.  It is also recommended to replace this seal anytime you remove the transmissi...

The OE quality flex joint is made of high quality rubber and is reinforced with advanced fiber materials. The manufacturer recommends the flex disc...