KOOK lists shorty headers and a Y-pipe with integrated high flow cats for my 2010 F-150. I've never heard of KOOK. Are they any good? Anyone tried either the headers or the Y-pipe? I'm thinking of running both (or maybe just the Y-pipe off the factory manifold) into a SISO system. Has anyone tried this?

Thanks.

 

I've never used Kook's headers but they are pretty popular with the Mustang, GTO, Camaro and SRT8 crowds.

 

Kooks has been around awhile, good products. Shorty headers aren't worth the swap, especially on 2009+ trucks which already have a shorty header performance to them as is, as compared to the restrictive 2008- model manifolds.

 

Thanks. Would the Kooks Y-Pipe (with integrated high-flow cats) make a noticable difference in performance or sound over the stock cats?

 

Not as much of an difference in your 2010. Ford really freed up some exhaust restriction in the 2009+. The manifolds are bigger like short tube headers and the cats are much smaller resembling hi-flow units.

I would go right to longtube headers for performance and sound.