226/232 537/544 114 $200 + shipping

5.3 heads 59cc chambers/ manley valves 2.02 int. 1.55 exh./ comp 918 springs w/ titainium retainers. The heads were hand ported and built by Trevin Lindsay. The guy is a wizard when it comes to motors and heads.He was on Pinks w/ a white 1970 Camaro, 355 ci, iron block iron head motor and took home Jamie Millers 434 small block Nova.
The heads were gone through just before I broke and have 500 miles on them. Valves and springs were new and have 500 miles on them as well.
$1,000 + shipping add 3% for paypal.

This was the combo I had in the 5.3 when it went 7.33 in the 1/8th.

 

bump.

 

5.3 heads fit on a 4.8?

 

Yes, 5.3 and 4.8 heads are the same. They'll work on the LS1 also.

 

Are these both for sale still?

 

Yes still for sale. I'll take $1100 for both + shipping and 3% for paypal

 

what kind of gains would I see with this and the mods in my sig?

 

I had Z06 cam, cai, and gibson shortys and cat back on the 5.3. I removed the cats and put the heads on at the same time. The heads were ported w/ stock valves and a valve job. The dyno showed 27 rwhp gain. 22 sounds more realistic and the dynos were months apart. I quit using dynos a long time ago when I got a wide band and I gage hp by how quick I can get down the track.
The heads need a cam to be effective, the cai and lt's you have help as well. The cam I'm selling is a good nitrous cam for a small motor. You should consider a different cam if you want to run n/a. My 5.3 would usually run 8.80's to 8.90's on motor and 7.60's on a 100 shot.
Hard to say what it will do on your 4.8. My 5.3 short block is for sale also.

 

bump.

 

is this cam a streetable cam or really aggressive? can i just pop it in without upgrading anything else? lemme know, very interested.