5k6

iTrader: (19)

What is the best set for S2s on an Evo 9? They are the same price...

ronaldo9

iTrader: (2)

This really depends on what you plan on revving too. Per GSC's site

5040 Beehive Rev and Boost range (using an S2 profile camshaft set)
Max RPM: 8,500
Max boost: 30psi


5041 Beehive Rev and Boost range (using an S3 or R2 profile camshaft set)
Max RPM: 10,500
Max boost: 44psi

Tuxevo

iTrader: (8)

One of the GSC spring offerings was reported to have breakage issues. I believe it was either the 5040 or the less expensive option they offer. I'd suggest either the 5041 springs or the Kiggleys.

There's a thread on here that will come up if searched that will give you the specifics on which ones were failing.

JM Auto Racing

iTrader: (4)

If you are interested in any of those, we have 10% off through tomorrow for all GSC products.

5k6

iTrader: (19)

Are there any disadvantages with going with the 5041s if your not reving above 8500? I read in some threads about extra cam wear? Will the stiffer springs create more valve train noise?

Why not go with the 5041s?

2rbolag

5k6

iTrader: (19)

2006EvoIXer

iTrader: (1)

cams will unlikely wear more than rocker roller bearings or cam caps.

turboburt1

Am reading your setup and its so close to my evoIX. I have maxed out HKS GTII-7460R at 34psi running quality E85, dynoed 476WHP. Doing some upgrades to get it close to 500 and am stock with valve springs. Getting GSC5039.