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**Murlo26** · 07-15-2010

They were more money yea...but its AMS, to be expected.

AMS said they have tested them up to 800whp on the X and they have used them on 1000whp+ builds on the 8/9. The AMS spec ones simply handle more power.

Not sure the exact differences, but here is some bullet points from the AMS website about the ones i got:

* Specially designed quench area that improves power and reduces the chance of detonation
* Annular pin hole grooves with double forced oil holes to prevent pinhole galling
* Taper lands to prevent scuffing
* Extra thick lands for superior ring groove support under extreme pressure
* 4340 taper bore, hard-chromed extra heavy duty pins for high strength and low weight

Taken from the AMS spec ones from the IX, should be the same features though.

07-15-2010	#722
Murlo26 Join Date: Dec 2009 Location: Lino Lakes Drives: 17 Honda Accord Posts: 4,041	Re: Dave's Evo X Build/The Life of Dave blog They were more money yea...but its AMS, to be expected. AMS said they have tested them up to 800whp on the X and they have used them on 1000whp+ builds on the 8/9. The AMS spec ones simply handle more power. Not sure the exact differences, but here is some bullet points from the AMS website about the ones i got: * Specially designed quench area that improves power and reduces the chance of detonation * Annular pin hole grooves with double forced oil holes to prevent pinhole galling * Taper lands to prevent scuffing * Extra thick lands for superior ring groove support under extreme pressure * 4340 taper bore, hard-chromed extra heavy duty pins for high strength and low weight Taken from the AMS spec ones from the IX, should be the same features though.