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CNC Throttle Body Booster Side Elbows – Fix for vacuum leak E30 M20 engines

March 3, 2022

These CNC booster side throttlebody elbows replaces your stock elbow. The original elbow is press fit from factory and loosens over time. Once loose, you end up getting a vacuum leak and up until these there was no great way to solve the problem. Most people either try a glob of JB weld or silicone; eventually fail again and cause risk of material ingestion.

The CNC units use two viton orings to produce a reliable and serviceable seal.

Initially made one for my own use, and many asked that I do a larger run; and I have, 100 units to be exact, once sold through I’m unlikely to be making anymore, so grab one now if you want one.

Price: $100 per elbow+ $8 shipping globally via small packet air. Most M20 E30’s run two elbows, some later production M20’s ran only one.

We recommend sticking with your preexisting setup; if your car currently has two, order two, if it currently only has one, order one. When ordering only one, we will send one of the two orientations at random, as orientation does not matter on cars that only run one.


Here for quantity 1:


Here for quantity 2:


Find the ICV side elbows here:

CNC ICV Elbow – Fix for ICV elbow vacuum leak E30 M20 engines

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