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Old 04-18-2012, 11:07 PM   #21
BooBerry
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That is awesome. You have any vid of your exhaust setup?
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Old 04-18-2012, 11:52 PM   #22
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Quote:
Originally Posted by Bwill9886 View Post

Interested to see what numbers you put down, and even more interested to see what numbers people get after adding a cat and what tuning can do for us.
I have been looking at doing headers and a high flow cat, there are 3 options for off the shelf exhaust systems

fswerks race: single muffler, so cat would have to go towards the back of the car, ideally the cat is as close to the engine as possible because the hotter the exhaust gases the better for the cat, i doubt this would pass inspection. Would have to cut pipe somewhere and weld cat in.

fswerks stealth: dual muffler, not much room for cat between mufflers unless cat was directly next to muffler which would probably impact performance. Or remove first muffler, replace with cat and weld extra length of pipe.

Borla: dual muffler, would have to replace first muffler with cat, and weld extra pipe, only 2.25 inch instead of 2.5"

none of the solutions are ideal and all would require welding
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Old 04-19-2012, 12:48 AM   #23
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Hmm, I'll check out FSWerks headers on there site. I may experiment with a set if I can order one next week. You are crazy man. Always the guinea pig. I usually like to wait tip the kit is made for the car specifically but that fits really well. If you could take another video of your exhaust setup and what it sounds like with this header that would be awesome. I'll look up the hp gains on their site.
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Old 04-19-2012, 06:59 AM   #24
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Quote:
Originally Posted by darkangelism View Post
I have been looking at doing headers and a high flow cat, there are 3 options for off the shelf exhaust systems

fswerks race: single muffler, so cat would have to go towards the back of the car, ideally the cat is as close to the engine as possible because the hotter the exhaust gases the better for the cat, i doubt this would pass inspection. Would have to cut pipe somewhere and weld cat in.

fswerks stealth: dual muffler, not much room for cat between mufflers unless cat was directly next to muffler which would probably impact performance. Or remove first muffler, replace with cat and weld extra length of pipe.

Borla: dual muffler, would have to replace first muffler with cat, and weld extra pipe, only 2.25 inch instead of 2.5"

none of the solutions are ideal and all would require welding
You forgot my option... 2.5" full exhaust header back :D
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Old 04-19-2012, 07:22 AM   #25
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Nice FocusBoy! I never doubted you either and you've been helpful to me through PM. Keep us posted on any potential CELs as you put on more miles.
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Old 04-19-2012, 07:47 AM   #26
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Good job FocusBoy....Looks like I my be in trouble now, going from hot roddin' my 04 Cobra to my 12 Titanium!!!!!.....$$$$$
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Old 04-19-2012, 08:48 AM   #27
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You forgot my option... 2.5" full exhaust header back :D
Which is why i prefaced with off the shelf options, a full custom like yours could easily add a cat, you are just in a different league right now with the mods you have done
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Old 04-19-2012, 12:01 PM   #28
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So what does your butt dyno say? How much of a difference do you feel through out the rpm range?

Any chance of posting a video, curious to see how loud this is?
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Old 04-19-2012, 12:13 PM   #29
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Quote:
Originally Posted by darkangelism View Post
I have been looking at doing headers and a high flow cat, there are 3 options for off the shelf exhaust systems

fswerks race: single muffler, so cat would have to go towards the back of the car, ideally the cat is as close to the engine as possible because the hotter the exhaust gases the better for the cat, i doubt this would pass inspection. Would have to cut pipe somewhere and weld cat in.

fswerks stealth: dual muffler, not much room for cat between mufflers unless cat was directly next to muffler which would probably impact performance. Or remove first muffler, replace with cat and weld extra length of pipe.

Borla: dual muffler, would have to replace first muffler with cat, and weld extra pipe, only 2.25 inch instead of 2.5"

none of the solutions are ideal and all would require welding
My thought was that you could move whatever muffler you have after the header back enough to put a cat in between the two.

Obviously this may not work for all mufflers, as most systems seem to have different sizes but it should work in most cases.

For those looking to do this mod in the near future, I'd suggest getting in good with an exhaust shop and having them make you a custom catback that's ready for an extra cat to be added. Could end up being cheaper than buying a full cat-back and having to modify it.
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Old 04-19-2012, 12:15 PM   #30
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These headers on FSWerks site say an increase of 6-7th in lightly modified cars and bigger gains on built/forced induction cars as much as 25hp+
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