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Ground Control Suspension
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M Coupe Diff Cover Install
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Diff Cover Comparison

E30 M3 Diff Cover vs. M Coupe Diff Cover

Here we see the two diff' covers side by side. The M Coupe cover has much more extensive fins, mostly down below the differential, where the fins protrude into the air flowing below the car.

Note the 10mm hex size on the old E30 drain/fill plug vs. the 14mm hex size on the new M Coupe drain/fill plug. Be sure to have the correct size on hand if you decide to go with the newer style plugs. I got nice stubby 14mm and 17mm (for the tranny) hex head sockets from Steve D' at the "Ultimate Garage".

The red arrows point out the vent outlets for the two types of differential covers. The E30 has a little vertical tube, which would actually make it very easy to attach a hose and run it up to an overflow/catch tank in the trunk. The M Coupe cover has only a small pin-hole. However, the M Coupe cover has a nice baffle on the inside (shown on a different page) which the E30 cover does not have.



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Home
Back to Installs
place holder
place holder
Installs Part-1
Installs Part-2
Installs Part-3
Ground Control Suspension
2.5 L Engine Rebuild
M Coupe Diff Cover
Custom Ergonomics
Sparco Stress Bar