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JBA Cat4ward Headers Part #1842S-9JS Customer Reviews
1 Customer Review
Reviewed by Robert M (COSTA MESA, CA) Reviewed for a 2007 GMC Sierra — Mar 12, 2018 10:40 PM
Started with a K&N cai with a throttle body spacer from airaid. Gave it a nice throttle response. With the JBL shorty headers it helped with some top end hp. Sound didn't change until I got a free flow magnaflow muffler. Now it has Alot of top end power. Very happy with everything. V6 4.3 need all the extra hours.