Brand x to Name brand + stock vs aftermarket mufflers - Pontiac G8 Forum: G8 Forums - G8Board.com
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

 
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post #1 of 8 (permalink) Old 05-15-2016, 07:21 AM Thread Starter
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Brand x to Name brand + stock vs aftermarket mufflers

So when i bought my car it had obx exhaust from the block to the mufflers, which are stock, wondering if there are any worthwhile power gains to be had from switching to say Kooks or Arh, Corsa, etc, and or am i losing power with the stock mufflers vs Solo or whatever, to justify the considerable cost
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post #2 of 8 (permalink) Old 05-15-2016, 10:11 AM
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Not sure if what you typed was intended? OBX is not stock. If you have the OBX your not going to gain much going to anything else, nor would it be worth the expense IMO. You could do a mid muffler and solo axle back if you wanted a different sound but to do the Solo alone would be much too loud and not sound good.

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post #3 of 8 (permalink) Old 05-15-2016, 10:20 AM
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- OBX is a clone of Kooks
- Stock GT muffs good to 450rwhp (demo'd on dyno)
The number you need to know is 2.2 CFM/HP exhaust flow

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post #4 of 8 (permalink) Old 05-15-2016, 10:46 AM Thread Starter
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So it sounds like i should just stick with what i have unless i want to change the sound, power gains will be negligible
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post #5 of 8 (permalink) Old 05-15-2016, 05:40 PM
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I picked up 9hp and 8tq changing from stock axle backs to Dynomax Ultra-Flo axle backs.

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Bolt-on G8 GT Record Holder. 11.82 @ 114 on a 1.60 60'
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post #6 of 8 (permalink) Old 05-16-2016, 12:44 AM
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the drone with other mufflers will drive you nuts !!!

09 G8/GT stryker blue 12.13 @ 114 , best mph 115
04 5.7 auto 1 of 273 12.300 @ 110.953 1.74 60ft , 11.49 @ 120 on da bottle , formerly BMR's gto
06 6.0 M6 1 of 227 13.282 @ 106 1.9 60ft


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post #7 of 8 (permalink) Old 05-16-2016, 09:37 AM
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The stock mufflers do well to quiet things down, especially with a full header and midpipe like you currently have. Adding GXP axle-backs would wake things up quite a bit for you, and I'm sure the OBX axle-backs would do nicely if you wanted more sound on a budget. But as far as extra power is concerned, mufflers don't make much of a difference on the butt-dyno.

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post #8 of 8 (permalink) Old 05-18-2016, 07:09 PM Thread Starter
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So I did a ricer mod and put some washers between the mid pipe and muffler flanges to create a strategic leak, for more loudness, it honestly sounds good to me but it's really loud at wot, I'll probably leave it like that for a while till it starts to annoy me, i love the way it sounds at idle though so much lope
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