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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-17-2013, 04:12 PM   #1
CBRpilot
 
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Stock manifolds, no cats, enough backpressure?

Only mods are CAI, resonator delete (x pipe in it's place), stock mufflers replaced with Borla XR-1's. I'm happy with the tone, but not with the volume. I've run this setup before on my 98 WS6 (cammed, LT's, ORX and bullet mufflers and dumped pre-axle) and the XR-1's sounded amazing. Do you guys think that stock manifolds with no cats will still provide enough backpressure to maintain most of my low-end torque?

I don't plan on EVER doing anything else other than LT's (50% chance of that in a year), and I want to maintain a decent bit of my low-end torque. My plan is to cut off the stock cats but flange both ends of the pipes, and then flange some offroad pipes so I can always go back to having cats for inspections or longer road trips.

Questions/comments/concerns? Lemme hear em!
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Old 06-17-2013, 04:33 PM   #2
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JBA cat deletes. do it, don't look back. You can bolt back on your cats if need be.
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Old 06-17-2013, 04:36 PM   #3
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No such thing as no back pressure!

Unless you don't have headers lol

Remember you have an engine pumping 376 cubic inches.
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Old 06-17-2013, 04:55 PM   #4
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Quote:
Originally Posted by grocerygetter View Post
JBA cat deletes. do it, don't look back. You can bolt back on your cats if need be.
This.
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Old 06-17-2013, 05:23 PM   #5
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The JBA off road pipes do indeed sound perfect for what you're looking to do. They are an easy install and won't require any cutting so if you have to reinatall your cats down the road its another easy swap. It'll add some volume and some horsepower to your current set up.
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Old 06-17-2013, 09:47 PM   #6
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Thanks guys! I've heard stock exhaust with this as the only mod and the sound is astronomically different. I'm slightly worried that I'll have a fair bit of drone but I'll address it later lol. Only problem is $220 seems a bit high for such a small piece of pipe. I'd imagine I could get my local guy to bend and weld up some flanges for around $150 installed. If not, these are mandrel bent and I'd prefer that so close to the headers.
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Old 06-17-2013, 09:49 PM   #7
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Just buy them. They're nice mandrel bent pieces, and have the O2 bungs already in them, and fit perfectly with no cutting or hacking anything up.
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