Headers & Cat Pipe
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8th Gear
Joined: Mar 2007
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From: Methuen, MA
Headers & Cat Pipe
Has anyone replaced stock exhaust with headers, high flow cat pipe and a dual exhaust. If so how was the perfomance enhanced, and what type of headers and cat pipe did you use. If I can find headers and cat pipe, my exhaust shop can bend up the pipes needed and supply mufflers. 1995 Bronco, 5.0L.
Thanks
Thanks
Junior User
Joined: Mar 2007
Posts: 78
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From: Lebanon, PA
I installed Flow Tech Headers with 2 1/4" collectors then had a custom muffler shop install 3" , no cats , Flowmaster IIs , directing them out the sides just in front of the back tires. I bought the Magnaflow cats in case i needed them for emission inspections but Im able to keep less then 5000 miles a year so im exempt.
OHH 89 Full size Bronco was a 302(5.0) now its 351(5.8) and runs like a bat outta hell!!!!!!!!!!!
OHH 89 Full size Bronco was a 302(5.0) now its 351(5.8) and runs like a bat outta hell!!!!!!!!!!!
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
any good quality header like gibson,jba,edelbrock,bbk or bassani. shorties would work just fine and produce good numbers. i would then run a bassani Y pipe with hi flow cat and run 3" single exhaust out stock location. you will gain low end which for your 302 will help a bunch. duals on our rigs isnt necessary and doesnt provide the performance it would on a mustang for instance.
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8th Gear
Joined: Mar 2007
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From: Methuen, MA
I think I amgoing with shorty headers, I don't know what kind yet, custom bent y pipe into one 3" magnaflow converter, possibly a magnaflow muffler and 3" single exhaust at stock location. depending on price, maybe all stainless.
Post Fiend
Joined: Jan 2007
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From: Stanton DE
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Hotshot
Joined: Jul 2002
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From: Bend,OR
how do you figure phil? shorties flow way better then stock manifolds and the technology today has improved them greatly compared to past years. long tube headers do provide more low end vs shorties but fitment of longtube headers can be a pain to install not to mention the added cost of having additional exhaust work to mate them. also for a fullsizebronco/f150 the routing of the exhaust with long tubes pos a problem around the tcase which in some cases has the exaust run just below the frame being suceptible to damage while offroading.
in a race application this would of course not be an issue.
in a race application this would of course not be an issue.
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Post Fiend
Joined: Jan 2007
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From: Stanton DE
Well they are a little better then stock but I was just thinking of the power. Unfortunately I have shorty's on my truck and they did not help with the power whatsoever. They are coming off and I have a set of long tubes lined up to go on.
They do hook up to you stock exhaust very nicely but are still a pain to put on.
So I guise I'm just down on them from the lack of power they produce.
They do hook up to you stock exhaust very nicely but are still a pain to put on.
So I guise I'm just down on them from the lack of power they produce.
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
so did you install the shorties and leave the rest of the exhaust stock? having the entire exhaust done from header to tail pipe will show the most gains. headers alone will not due to fords stock y pipe/cat setup which is the major restrictive peice.
Post Fiend
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From: Stanton DE
Originally Posted by Kemicalburns
so did you install the shorties and leave the rest of the exhaust stock? having the entire exhaust done from header to tail pipe will show the most gains. headers alone will not due to fords stock y pipe/cat setup which is the major restrictive peice.
Hotshot
Joined: Jul 2002
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From: Bend,OR
ok so with that setup you can figure any power increase would be hi in the rpm range before you would notice anything. since your blown and sprayed long tubes would benefit you off the line for sure.
Post Fiend
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From: Stanton DE
I sure hope so,,,there not cheap,,,lol.
A guy has a set of Kooks that was on his truck for only a couple days. Hes selling them to me for 700.There 1" and 5/8ths hes making more power then me and went with 1" 3/4ths
A guy has a set of Kooks that was on his truck for only a couple days. Hes selling them to me for 700.There 1" and 5/8ths hes making more power then me and went with 1" 3/4ths
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