oo Expy Ehaust Modification
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Senior User
Joined: May 2004
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From: Ottawa, Ontario, Canada
oo Expy Ehaust Modification
I am pondering an exhaust modification. I looked in the "exhaust" forum and got a few ideas, but most of them relate to making the truck louder. My first consideration is performance, then gas mileage, then a nice sound. Any advice from the Expy drivers?
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Joined: Feb 2005
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From: Central PA
I have a Gibson swept side cat-back on my 98 EB 5.4. It has a real nice low rumble, but its not too loud. As far as performance and mileage, I got no change. I added a K&N filter 3 months ago and got a 1mpg increase. I'm still happy with it though. It looks and sounds great. Headers might give you more performance, but that might also be a little louder.
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From: on a ROCK
Flowmaster American thunder!
Gibby's are made with inferior stainless that will rust, not rot through but rust. I spent over 3 hundred on a Gibson system once just to see it rust a few months later. Obviously this will not impact performance but at the prices they charge for their kits I find it not that great of a deal. Iceman is right about the sound and performance though, performance gains are barely measurable at best.
Flowmaster makes their stuff with aluminized steel which retains that aluminum look.
Gibby's are made with inferior stainless that will rust, not rot through but rust. I spent over 3 hundred on a Gibson system once just to see it rust a few months later. Obviously this will not impact performance but at the prices they charge for their kits I find it not that great of a deal. Iceman is right about the sound and performance though, performance gains are barely measurable at best.
Flowmaster makes their stuff with aluminized steel which retains that aluminum look.
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From: Ottawa, Ontario, Canada
Thanks for the info Boatcop. I had heard that Flowmasters lasted quite well. There is a website that has soundclips that may give an idea on loudness. I am on dial up so it takes a long time to load even one clip. I guess nothing short of a true duel exhaust will help performance. I am not sure I want to go that far! If I do anything radical, I will be sure to post it.
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Originally Posted by tonum24
I have Magnaflow cats and cat back along with Gibson ceramic coated headers. I live in Mass.(salt winters) and after 18 months it looks great. A mean sound too.
Dakota as far as "true duel exhaust" goes your right but you got to remember even with real duels, high flow cats and quality headers the power potential wont be there until the vehicle inhails better too! ie: ported intake, better heads, cai, throttle body even just a k&n will help. nowadays its best to add a quality full exhaust, free up the intake tract and invest in a power programmer that will reflash the computer. with that you will be getting the best bang for the buck and notice apreciable gains all throughout the tourque curve as well as rpm band.
Boats
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From: Ottawa, Ontario, Canada
Boats, I am heading that way, but thought I would start with the exhaust. The K&N is probably the easiest. Not to re-hash threads I have seen on the forum, but I have read that these high air flow systems do not do quite as good a job of "filtering" the intake air. That may be the price to be paid to get more air in. I like the idea of porting the intake and improving the throttle body. I will have to do a bit of research on these.
Thanks for your help everyone.
Thanks for your help everyone.
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From: on a ROCK
Originally Posted by EagleDakota
I like the idea of porting the intake and improving the throttle body. I will have to do a bit of research on these.
Thanks for your help everyone.
Thanks for your help everyone.
By the way how cool would a Blown Lightning Engine be in an Expy?
