Hey guys, I'm trying to figure out the size of a GSR Headgasket. I am running a JDM GSR with stock internals and a T3/T60-1 H.O. Turbo and looking for about 350 whp. I want to upgrade to a thicker headgasket along with some APR Headstuds.

Any info on the size of a GSR Headgasket would be great.

Thanks

 

stock hg

 

Hmm.. Really? I thought maybe it would lower my Compression Ration a little. No?

 

you don't need to lower cr

they got itr's making that power at 11.+:1 cr

 

Hmm. Any other in put on this from anyone else? What size or what ones are you guys using.

Thanks

 

OEM headgasket is fine. alot better imo than cometic. If the pro teams use OEM gaskets on there 600+ HP cars then good enough for everyone below that.

 

Yea maybe I can just get a thicker OEM gasket. No one knows what size GSR's are?

 

yes the OEM gasket is Good to 81.25mm Bore. stock bore is 81mm.

 

Thanks

 

stock...dont pull the head unless you need to replace the headgasket. dont fix it if it isnt broke. lol i made 400whp on stock gsr...including stock head studs a few years back. was my daily driver for months.