FatCat bumpstops
 

Set of FatCat bumpstops
58mm
Two "red"
Two "white'

https://farm9.staticflickr.com/8260/...5f39318228.jpg

Used one autoX season, maybe 4,000 street miles. $50 shipped.

Bump.

These are shorter than the OE stops; I shimmed the rears up to stock length and it made a nice difference in my steady-state balance by keeping the front suspension off the stops (not to mention the harshness over big bumps). These are ~$110 +shipping from FCM.

wats the purpose of these?


Posted from Rx8club.com App for Android

I was able to dial out some steady-state understeer by shimming the rears to OE height (whites plus a portion of the OE stops) but using just the reds on the front. The whites are stiffer than the reds. The RX-8 is designed to corner on its bumpstops (especially on stock springs + Hoosiers), so giving the front suspension a little more room to work meant that in cornering the suspension stayed off the stops in the front, effectively providing a softer front roll rate and improving grip. The fact that they are shorter and a bit softer meant that the effect of hitting them was a little more mild/progressive.

Fat Cat Motorsports - Koni products - Miata 06+, RX-8 04+
Fat Cat Motorsports - Application guide

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