I have a set of TPiS Ported Heads. I bought them on a motor that I used in the race car. I had a VERY reputable NHRA engine builder rebuild the heads and give them a good valve job and then ran them in my car with the matched TPiS ZZ9 cam for a season. Roughly 5 race weekends....no street time.

Never dyno'd it, but it was probably in the neighborhood of 350 RWHP with this....new upgrades.....same but 'o meter today is 400 RWHP so that is my best guess. All stock bottom end and top end.

The following is from TPiS's web site:

These heads are factory castings that are completely inspected before any work is started. They are then given to our porting wizard. We install a 2.00" intake and a 1.56" exhaust valve. We use only Manley Premium Stainless Steel Valves. Each head is ported for max performance and given a 3 angle valve job. Then they are cc'd, milled, flow-benched and assembled with new guideplates, springs, and lightweight retainers. These are a great value in a stock casting.
LT1 Flow numbers in .100 increments for the stock castings are as follows: 58, 115, 177, 214, 214, 214. Our ported LT1 heads with a 2.00/1.56 valve flows the following 70, 145, 203, 241, 265, 277. As you can see we get some great numbers out of these heads, and at $1250/exchange it's a tough head to beat.

They charge $1250 for the service....plus a core. Say $200 for a good core off of eBay...so $1450 new.

I would like to get $900 obo out of these heads.....

Lemme know (IMG:http://www.frrax.com/rrforum/style_emoticons/default/cool.gif)