American Heritage

LS7 cylinder head rework package 4

We have lots of Corvette forum member running our reworked heads. We have heads customers running our reworked LS7 heads in 17 states and 5 country's. All happy/satisfied customers. We ship anywhere (any state or country).
We stand behind all our work 100%
Our most popular LS7 cylinder head package is our:


Package 4 Head (includes):

- Disassemble and Assembly of LS7 cylinder heads
- Performance Valve Job (show to add 5hp+ over the stock valve job)
- Resurface Heads (or milling of heads)
- Clean and Bead Blast entire head (so they look brand new)
- Hardened Aftermarket Powder Metal Valve Guides (Harder than aftermarket bronze guides)
- Treated (tumble polished) stock Titanium intake valves (sent to DelWest for treatment)
- Ferrea Competition Plus Exhaust Valves F2042P (85 grams)
- New Viton Valve Seals and machined valve locks

Total price for American Heritage Package 4 LS7 heads: $1,308 (plus return shipping via USPS Priority with insurance).



We also offer BTR dual springs with titanium retainers for an additional $300, GMPP LS7 MLS head gasket set $100, GMPP LS7 MLS exhaust manifold gasket set $35, ARP LS7 head bolts $120

We also offer Porting and Polishing for an additional $550 (we port the old fashion way, by hand. We have been hand porting cylinder heads for over 15 years). All our port work is done using a super flow flow bench. Our ported LS7 head flow number rival some of the big name brand heads that are nearly twice the cost. See our flow sheet bellow.

Finished Package 4 head with checked stock LS7 springs


Perfect RA finish on the Decks/sealing surface


Our aftermarket Hardened Powder Metal Valve Guides


Ferrea F2042P exhaust valve (a tested and proven exhaust valve)


Treated stock Titanium Intake Valve


Ported American Heritage LS7 head (Fresh performance valve job)



American Heritage Ported LS7 head (intake port)


American Heritage Ported LS7 head (exhaust port)


American Heritage LS7 head being flow tested on our Super Flow flow bench


American Heritage Package 4 Ported LS7 head, intake flow sheet


American Heritage Package 4 Ported LS7 head, exhaust flow sheet


American Heritage Package 4 dyno graph, Stock C6z06 (stock cam, stock, springs, no mods).


We have core sets available and ready to ship out (for those that don't want any down time)
We also offer support as part of the sale (this means you DIY guys can call us with re assembly questions (we answer the phone even at night and on Sunday's).

We can be reached at (questions, ordering, comments)
http://www.americanheritageperformance.com/Contact.html
310-326-2399
Email, or PM us on here

erikszr1

well put together.

vertC6

Awesome work Kohle!!

Have you received any results on your guide wear testing?

Wndotintman

I am a happy customer! I did the stage 4 kit a few weeks ago. Everything was just as advertised. Kept me update throughout the process. Even followed up after I received my heads and offered support If I had any issues during the R&R. Now thats customer service! Thanks Kohle!

MTPZ06

Gonna have to find some time to get in there for a "wiggle test" soon. My GMPP is through April 2016.

021z

Stage 4 here with 2000 miles so far. Above and beyond customer service and great looking heads when complete. The power is great and I enjoy knowing my heads will be fine for a long time. Do yourself a favor and send them to Kohle asap. Had mine back in about a week with daily updates as they went along and install questions answered at 11pm at night. Picture is after 1500-2000 miles and looking great. Pricing was much better as well compared to some of the others.

Feel free to message me for any feedback or questions...

Dave

Undy

Kohl, got a question...

I've got PRC 265s on my 101K mile Z06. At some point I'll end up pulling the whole engine to do a complete R&R. At that time I'll want to go thru my PRCs.

Can you;

1) Remove the bronze and install your new PM guides?

2) Install Ferrea's hollow stem exaust valves?

3) Install PSI's 1115 Behive springs?

4) Touch-up the heads? (skim cut, valve job etc)

AZDANZ06

Do you guys do shop work such as if I dropped my car off and had you do all the work from removing heads, doing the head work and re-installing?

Yankee15

I'll 2nd that. Kohle was unbelievable to work with. Got my heads quick and had great results. My Dyno Guy (that's my sheet above) was extremely impressed with the performance bump we saw from stock. On top of quality work AH came in well below others.
Thanks again Kohle

BOTTLE FEDvette

Thanks for posting this...this helps out a lot!

American Heritage

Yes sir we have a full shop facility for service/repair/modification work. We do several C6 Z06 cylinder head removal, rework and installs a month.
We have also replaced LS7 heads under GMPP warranty (and several other aftermarket warranty company's).

Yankee15, Dave and wndotintman thank you for your responses/reviews

American Heritage

PM me if you need any further details on your setup.

AZDANZ06

I will let my Father In Law know, he lives out in Yucca Valley and has a 2006 Z with about 45K on it. My 2008 Z has an extended aftermarket warranty which is good for another 2 1/2 years.

BOTTLE FEDvette

Question about your PM guides, are they taller then stock? I read or saw in a video that a competitor that uses bronze valve guides are taller to help with valve stability. So details please.

American Heritage

Our aftermarket hardened PM guide is just slightly/barley longer/taller than the factory PM guide. Our Moldstar90 guides are also just slightly/barley longer/taller than the factory guides.
Our aftermarket hardened PM guides also use oil spiraling to help retain oil in the guide at high/sustained RPM's.
In our opinion though the guide does not need to be any longer for this application. Proper geometry, materials and finish is the key to success with the LS7 heads. As you can see from the dyno graph the valves are very stable at all rpm's.

dwakeman

Just another "thumbs up" for Kohle and American Heritage. While I haven't done his head package yet, I did work with him on some other stuff for my 2007 z and he/his shop is top notch!!!!

American Heritage

Very soon Sir, I spoke with our contacts last week and we are close (way behind schedule on getting results back, but closer non the less). I will post all that in a separate thread as soon as I get it in.

rsmithuf

Are your dyno numbers with the heads after a tune or not?

Turbo2L

I wish all head vendors were this forthcoming and transparent. I had a set worked by a prominent shop out west and they did not live up to the hype in quality or performance. I sold them before ever installing them.

Kudos to you guys for building this type of relationship with your customers and potential customer base.

veilseven

You can add me to the list of extremely satisfied customers of package #4. I'm halfway across the country from Kohle and the entire experience was flawless. I did the R&R myself, the second week I owned the car. Kohle was helpful and responsive throughout the process.