I just got an 88 hatch with a 1st gen b16a. The mounts are "custom" according to the guy who sold it to me, so I am a bit suspicious of their quality. When I downshift from, say, 4th to 3rd, with the 3rd gear RPMs above 5k or so, there is a loud "clunk!" and the car is shaken for an instant. My question is, what's causing it? The clutch is ACT stage 2 (6-puck) with ACT pressure plate, and it seems fine. It's gotta be the mounts, right? Thanks for the replies.
loud clunk during hard downshift
- Thread starter KFBhonda
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The mounts are probably allowing the rear L bracket to hit the rear crossmember. Even when modified heavily, the L bracket is VERY close to that crossmember, like 1/2" or less. I had to go with the Race eurethane mounts from Hasport to keep this from happening on my car entirely. They're not too bad. A little shakey, but in a nearly 300 WHP Honda, it's expected. 
