blackz03

Good afternoon, just wondering if anyone has sent there factory LS7 heads to American Heritage performance and had there stage 4 package done? If so, any issues or what were your experiences? Thanks in advance!!

1972bluelt1

I sent mine in 2018, I wanted my heads reworked rather than an exchange. As I recall it took 5 or 6 weeks total including shipping them from Indiana and returning them, but I think they're busier now. They were great to work with. Answered all my questions, returned emails and phone calls quickly. No issues.

493lszosix

They’ve done 2 sets for me no issues

StayinStock

If you go to the Z06 section theirs lots of folks there that have had great success with AHP. Their a forum sponsor and post in that section often. @American Heritage

Dano523

FYI, while heads are off, great time to replace the plastic lifter trays with new OEM units.

If going with a higher lifter cam to get more valve lift, then instead of going this way, think higher rocker ratio to get more valve lift that way, instead of the lifter having to travel more in the lifter trays to wear them out faster. Hence only thing preventing the roller lifter from twisting to take out the roller and cam lobe, is the plastic lifter tray.

American Heritage

Thanks for the nice words guys and the prior business!!!
OP feel free to shoot me an email if you have any questions (its easier to get a hold of me vs the phone)
hp@americanheritageperformance.com
Kohle

https://americanheritageperformance....cylinder-heads