I have an automatic v6 2004mustang and already have a flowmaster 40 series muffler in my car.
I want to put headers and a cool air intake under the hood but I wanted to know if it would make that big of a difference in performance and if so what ones would you recommend.
Thanks
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Longtube headders are worth it, shorties arn't. If you want to make it louder, get longtube headders with an o\r x pipe. Check out my dyno numbers in my sig for exhaust and an intake spacer.
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4.3L underway
saving money for a cam
+1 It make not be a huge difference, but itll wake the car up a bit and deffinitally sound nicer. If you get a cai just get one that is protected in the fender so your not sucking in hot air... or as much hot air as one that hangs in the engine bay.