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Old 01-14-2013, 02:18 AM   #1
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Different kind of exhaust question!

So I I want my car louder but I have a big problem. Normally I would just go out and buy an off road h or x but i have a custom welded cat back done by a shop and a mid pipe wouldn't bolt up for obvious reasons. I live in California so smog is a PITA. What should I do?
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Old 01-14-2013, 08:02 AM   #2
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So I I want my car louder but I have a big problem. Normally I would just go out and buy an off road h or x but i have a custom welded cat back done by a shop and a mid pipe wouldn't bolt up for obvious reasons. I live in California so smog is a PITA. What should I do?
do you have a mid pipe at all right now? i dont see why it wouldn't work. it would just take some welding work. you're right on track for going with an off-road mid pipe. but if it is as strict as say it is then i wouldn't bother taking the cats off. have you looked into high flow cats?
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Old 01-14-2013, 10:43 AM   #3
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do you have a mid pipe at all right now? i dont see why it wouldn't work. it would just take some welding work. you're right on track for going with an off-road mid pipe. but if it is as strict as say it is then i wouldn't bother taking the cats off. have you looked into high flow cats?
I just have the stock cats on there and he welded it on right past the second cats. He said he can get me CA legal cats installed and everything for $250 each.
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Old 01-14-2013, 10:57 AM   #4
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I just have the stock cats on there and he welded it on right past the second cats. He said he can get me CA legal cats installed and everything for $250 each.
so if they're welded behind the second cats a mid pipe would fit just fine as long as the piping is the same size. I'd go with a prochamber or just go with some LT headers. i wouldn't touch the cats because the ones on your car right now are "legal cats" ha.
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Old 01-16-2013, 01:18 PM   #5
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so if they're welded behind the second cats a mid pipe would fit just fine as long as the piping is the same size. I'd go with a prochamber or just go with some LT headers. i wouldn't touch the cats because the ones on your car right now are "legal cats" ha.
But I don't know how to weld and my exhaust shop won't weld in anything illegal in California
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Old 01-16-2013, 01:35 PM   #6
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Purchase two high flow cats & a ProChamber, they will weld it in place and you will love it.
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Old 01-16-2013, 02:03 PM   #7
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Purchase two high flow cats & a ProChamber, they will weld it in place and you will love it.
Prochamber is better than just a H? I was going to have them weld in an H.
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Old 01-16-2013, 02:58 PM   #8
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depends on the sound you want...a prochamber is quieter then an h pipe when cruising but at WOT it's quite loud.
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Old 01-16-2013, 04:37 PM   #9
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But I don't know how to weld and my exhaust shop won't weld in anything illegal in California
find a different a exhaust shop lol
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Old 01-17-2013, 01:55 PM   #10
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ProChamber information: Patent US5740671 - Balance box exhaust accelerator - Google Patents
You can Google the ProChamber on different V6 engines. It was made to collect & then accelerate exhaust gasses. The performance is nice, (gained 10HP with it & LT headers) but it sounds deep and attractive to me, personally.
*A set of common metal high flow cats should pass Ca. emmisions no problem at all (California emissions documentation should accompany the cats)
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Old 01-17-2013, 08:35 PM   #11
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purchase two mid pipes, one with cats and one without cats.
have them bolted on not welded on and every time you need to smog just swap the mid pipes.
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Old 01-20-2013, 07:20 AM   #12
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FYI: California rated cats- http://www.summitracing.com/parts/mp.../model/mustang
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