I would like to up grade my stock exhaust 1st question what is the performance differance of shorty headers vs long tube headers?2nd I live in Kauai and there is no need for cat ie. no smog. Tru duals vs large single?

 

Long tube headers give more lowend and in my opinion better sound. What engine have you got? with a 460 I would say go with dual 2.5", 302 you can get away with dual 2" most of the engines in between I would say go with 2.25" ture duals. I can probly narrow it down better knowing the engine though.

 

you are right I should have listed engine size etc. 1991 F-150 extended cab 4X4 engine size 302 (5.0)