I am looking for headers and Dual cat back exhaust system for my 2001 4.2 F150, and i do not know which to choose between Gibson Exhaust or Mac? does anyone know how much hp i can gain with the Mac exhaust? and who makes better headers Mac or Gibson? Im leaning for the Mac exhaust and headers but thats because its a bit cheaper than Gibson, but let me know what you think.

 

go to you tube and type in 4.2 f150 exhaust listen to the one with the gibson exhaust it sounds great for a six cylinder i would probably go with gibson but i don't know much about mac exhaust

 

i had a gibson for 90k miles until it rotted out. i am buying the ss version just for northeast winters. sounds a bit like a ricer off idle but is different enough not to confuse.