We finally had the opportunity to test the set of Kooks longtube headers and catted X-pipe we have had laying around, the results were as advertised by Kooks with gains of 50rwhp and 62ftlb.

We were extremely impressed with the quality, and performance of the Kooks header system. The car's new tone at WOT is incredible, however it is still extremely mild when the exhaust valves are closed.




http://i848.photobucket.com/albums/a...ps811775cb.jpg

http://i848.photobucket.com/albums/a...s49830fac.jpeg

http://i848.photobucket.com/albums/a...s65918e23.jpeg

http://i848.photobucket.com/albums/a...ps3eb49d5c.jpg



Note: Numbers are in an SAE correction factor, the STD numbers (which some vendors use) were 471rwhp/483ftlb

http://i848.photobucket.com/albums/a...ps1636eded.jpg

Here's an interesting comparison this C7 vs a stock 2009 C6 Z06. Its amazing how much torque the new LT1 produces in comparison to the LS7.

http://i848.photobucket.com/albums/a...ps03e29c8a.jpg

Here's a graph representing the pre-tuning gains of the Kooks Longtube headers with a catted X-pipe.

http://i848.photobucket.com/albums/a...ps1657ec35.jpg