My friend bought these heads about a year ago from a member on here and is going a different route and i was wondering if these would work for my application or just be "too much" head for my application.I have a 98 Z28 Vert with all bolt ons and an MTI X1 230/227 .591 .571 112 LSA camshaft "crappy" stock 98 heads and 4.56 gears.Never reall got any tipe of info on the heads just what was in the post.https://ls1tech.com/forums/lsx-parts-sale/436676-stage-3-ls6-heads-1600-shipped.html
Thanks for any help.

 

"stage 3" heads usually indicate 2.08 valves. There is no way they will fit with the X1 without flycutting quite a bit.

 

Most people do not lose there flow sheet for there heads. I would want solid proof of what they did on the bench and what they are. I got screwed on a set of used heads I got on this board. And for that price.... You could get some real nice NEW ones.

My .02.

 

Thanks for the help guys he ended up getting them for $1000.He had them running on my old 02 z28 with an FMS F11 228/230 .576 .595 114 LSA with no flycutting.

 

Would 2.08 valves really cause that much trouble to have to flycut?Im just asking because we installed them on his ride with a little bigger cam and no problems would i gain any power from these to make it worth the swap?

 

I had mocked up UNmilled MTI stg2e (2.02 valve) heads, stock .060 gasket, and the X1 on a 112. I clayed and had less than .040" clearance on the intake valve. Needless to say I didn't run that combo. The X1 is tight.

YMMV but whatever you do... check your clearance before you crank it up.