Calspeed headers?

[Gamecocks]

I have 04 z71 Tahoe. Has anyone installed these long tube headers on a Z71 yet? I've done some research but I keep seeing post about fitment issues with long tubes. I have not seen much about the calspeed headers. Does anyone know how much gain these have?

http://www.calspeedperformance.com/product_p/csp-silverado%2099-09%20headers.htm

 

[Matt06Yukon]

They look gorgeous but too cheap to be true. Also looks like for offroad use, I don't see any room for cats with that setup unless your using someone else's y-pipe.

 

[JennaBear]

I would look into Dynatechs or AEMs.