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Stock 12a exhaust system

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Old Jan 31, 2022 | 07:54 AM
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Tyler wonnacott's Avatar
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Stock 12a exhaust system

Hey I’ve just successfully rebuilt my first 12a and I’m looking to blow a bit more cash.

im not looking for anything crazy but the stock exhaust is rough and I’d like to replace it with something better sounding than oem. My budget is 700 give or take a bit and I’m curious to if anyone knows of any setups around that price. If anything the thermal reactor should be the first to go as it was a bit of a pain to deal with in the first place.

any advice would be greatly appreciated.
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Old Jan 31, 2022 | 08:23 AM
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Racing Beat Long primary complete exhaust. It will cost more then $700 though.
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Old Jan 31, 2022 | 08:28 AM
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The best out there is the RB SP system but its over 1K in price. Save yer pennies!
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Old Jan 31, 2022 | 09:56 AM
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If your area doesn't require emissions testing then definitely get the RB Street Port full exhaust (as suggested above). I started with the RB single exhaust because it was a little cheaper (+- 900 vs 1100 at that time) and regretted not getting the better one. My current build has the Street Port (long primary) system. You could also just buy one of their headers and have a local muffler shop build you something from there back.

RB is the only company I know of that builds exhaust kits for the early RX-7's. Pacesetter makes a cheaper, painted header but it's thinner metal and will likely burn through. The rotary exhaust is much hotter than on a piston motor and burns through cheap exhaust tubing. Yeah so, for good and affordable I'd probably talk to a local shop about building a header-back system for you.
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Old Feb 1, 2022 | 07:25 PM
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Pacesetter is a false economy; they always burn through and it's a big hole right in the elbow of the tightest bend. When it burns through, it sounds nasty and is downright unsafe with fuel systems directly above it. Racing Beat is the only worthwhile alternative, and I ran a Pacesetter back in college because it was all I could afford at the time. I've learned better since,
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Old Feb 1, 2022 | 09:36 PM
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another one down for the RB streetport system here.
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Old Feb 2, 2022 | 04:58 AM
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I have the RB street port system on my 80 LS and it sounds incredible. I wouldn't want any other exhaust on my RX-7 personally.
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Old Feb 2, 2022 | 06:27 PM
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I’m also advising a RB complete exhaust system. I had one on my SA for about 15 years and it still looks and sounds great.
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Old Feb 13, 2022 | 09:50 PM
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haven't some posted that RB quality has gone way way down from what it was: lousy welds, thin metal ?????
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Old Feb 14, 2022 | 05:50 AM
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I've read that some people were unhappy with Racing Beat's current exhaust system. Its made differently now that it was in the past.
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Old Feb 14, 2022 | 10:12 AM
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Originally Posted by midnight mechanic
haven't some posted that RB quality has gone way way down from what it was: lousy welds, thin metal ?????
M.M., I was someone who complained about RB. But they really are the only game in town if you want an exhaust that is purpose-built for our cars, and they have decades of racing experience to back it up.

In my personal experience with exhaust systems for modern Subarus and 70's-80's SBCs... RB's exhaust build quality is low for the price. By modern standards anywhere. But none of my RB system has failed or leaked... not the ugly welds or poor chroming. They are structurally sound (in my experience). Just not "pretty" like more mass-produced systems, so...
Function over finish.


Last edited by Maxwedge; Feb 14, 2022 at 11:00 AM.
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Old Feb 23, 2022 | 10:34 PM
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I recently added the Complete Exhaust System to my 81 RX. It sounds great, looks good, and definitely added the 22% horsepower that RB’s advertised. You won’t be disappointed.
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