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Chevy's R07 Cylinder Heads, complete

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Author: Jordan Johnson   February 12, 2012 at 17:21:59  from

I have a set, 2, GM Racing R07 Cylinder Heads. These are the cylinder heads that were purpose built by GM for NASCAR Racing.

Xceldyne Intake valves : 2.180 head x 5.980 long x 6mm stem weighs 73 grams
Xceldyne Exhaust valves : 1.6325 head x 5.735 long x 7 mm stem weighs 63 grams
These come with valve seat locators, polished PSI valve springs & mini top lock titanium retainers.
Approx Spring Rates: 200 lbs @ 2.00 in, 575 lbs @ 1.250 in
Intake port: 1.730" x 1.985"

I've been told they will flow above 380CFM.

The Valve train alone is worth about $700 2nd hand. If you are interested, email me at jorjohnso@gmail.com. We will talk price then. I'm pretty flexible though.

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