LT Headers w/ the rest stock..anyone?
03-23-2011, 05:36 PM
#2
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with true long tubes, you'll delete the primary cats. You could leave the secondary cats in, or not. I've removed them, replaced with 3" mids that bolt up to the resonator, then stock from there back.
03-23-2011, 05:40 PM
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'11 C63 w/ P31
Id also be curious if someone did a mid or full length header (lf possible) and left all the cats in place. Be curious to see what power was gained.
03-23-2011, 05:49 PM
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'11 C63 w/ P31
it would depend, u would need one if u ran long tubes and deleted the primaries, so yes.
but maybe no tune if running some sort of headers (log manifold excluded) and maintaining all the cats, if that is possible. In this situation im just very curious to see what gains come from just the headers.
but maybe no tune if running some sort of headers (log manifold excluded) and maintaining all the cats, if that is possible. In this situation im just very curious to see what gains come from just the headers.
03-23-2011, 06:18 PM
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Thats what I had before race exhust hhughes is running that setup now
03-23-2011, 06:19 PM
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I dont think it'll fit unless u put them under the car
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03-23-2011, 06:56 PM
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'11 C63 w/ P31
03-23-2011, 07:00 PM
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Also, I think another benefit to a race exhaust is the weight savings.
03-23-2011, 07:17 PM
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'11 C63 w/ P31
But yes cats weigh a good amount, so good weight savings, but also im curious if there is any torque loss at low rpms...or maybe not with this engine, so far I havent really seen exhaust cause any low rpm torque loss. Prob cause its a big V8 but on my GT3 usually u gained at high rpms, but lost low end torque.
Last edited by DD GT3 RD; 03-23-2011 at 07:19 PM.
03-23-2011, 11:52 PM
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thanks for sharing...that just shows videos dont show sound properly. The vid with secondary cats sounds louder to me than the race exhaust, which it obviously isnt.
And dyno's between the 2 exhausts?
And dyno's between the 2 exhausts?
03-24-2011, 12:23 AM
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I don't dyno since they mean practically nothing to me when I throw my stock exhust back in I'd be happy to vidoe it of no one steps up before then
03-24-2011, 10:39 AM
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M5, C63, 335Ci
I'll be having this setup installed within the next two weeks. MBH LTs with OEM secondary cats, resonator and mufflers. I'll post up sound clips or video after the install.
03-24-2011, 12:33 PM
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'11 C63 w/ P31
