Header or downpipe?
08-29-07, 12:18 PM
#26
He who smokes bitches
Downpipe refers to the piece of pipe that runs from the back side of the turbo to the rest of the exhaust. You dont need a downpipe unless your turbocharged.
Since you have an S5 N/A, you need a header. It will make the car louder, and it will be quite loud with the Apexi GT spec. It'll sound pretty good, but will be loud unless you have a resonator or two, and a cat still in place.
Since you have an S5 N/A, you need a header. It will make the car louder, and it will be quite loud with the Apexi GT spec. It'll sound pretty good, but will be loud unless you have a resonator or two, and a cat still in place.
Good luck with the downpipe laserkei. I made the mistake of getting a header. Not only is the downpipe a lot less of a pain in the *** to install, but is also quieter with similar power gains.
08-29-07, 02:41 PM
#27
How about a cup of RAGE
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And you don't need to be answering questions when you don't know the answer.
Good luck with the downpipe laserkei. I made the mistake of getting a header. Not only is the downpipe a lot less of a pain in the *** to install, but is also quieter with similar power gains.
Good luck with the downpipe laserkei. I made the mistake of getting a header. Not only is the downpipe a lot less of a pain in the *** to install, but is also quieter with similar power gains.
08-30-07, 11:38 PM
#31
How about a cup of RAGE
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08-31-07, 08:17 AM
#32
Um...the GT doesn't have a pre-silencer, does it? That's why it's call a cat-back, from the catalytic convertor back. The presilencer replaces the cat and thus, would not be part of a cat-back exhaust.
Now if you had an engine-back exhaust, that would entail headers, pre-silencer and cat-back.
Now if you had an engine-back exhaust, that would entail headers, pre-silencer and cat-back.
08-31-07, 10:52 AM
#33
How about a cup of RAGE
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Um...the GT doesn't have a pre-silencer, does it? That's why it's call a cat-back, from the catalytic convertor back. The presilencer replaces the cat and thus, would not be part of a cat-back exhaust.
Now if you had an engine-back exhaust, that would entail headers, pre-silencer and cat-back.
Now if you had an engine-back exhaust, that would entail headers, pre-silencer and cat-back.
08-31-07, 11:24 AM
#37
My car's previous owner ran a dummy cat instead. You could try finding a way to bolt the outside metal covers of the cat around your pre-silencer for it to fool visual. As for smog, look for J-rat's recipe for cheating emissions only if it's absolutely necessary. Alternatively, you can always buy a cat and bolt it on solely for emissions checks. My tuner also told me you don't need to blockoff the split air tube, though i would do it anyway, i'm just looking for a block-off plate. FWIW, my split air tube that goes to the cat is pinched.
S4 is exhaust backpressure activation for 6PI. S4's do not have VDI.
electronic (on both S4 and S5) is an modification that you have to perform yourself. So is airpump activation on S4.
S5 is air pump activation on both VDI and 6PI.
electronic (on both S4 and S5) is an modification that you have to perform yourself. So is airpump activation on S4.
S5 is air pump activation on both VDI and 6PI.
08-31-07, 12:41 PM
#38
How about a cup of RAGE
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My car's previous owner ran a dummy cat instead. You could try finding a way to bolt the outside metal covers of the cat around your pre-silencer for it to fool visual. As for smog, look for J-rat's recipe for cheating emissions only if it's absolutely necessary. Alternatively, you can always buy a cat and bolt it on solely for emissions checks. My tuner also told me you don't need to blockoff the split air tube, though i would do it anyway, i'm just looking for a block-off plate. FWIW, my split air tube that goes to the cat is pinched.
S4 is exhaust backpressure activation for 6PI. S4's do not have VDI.
electronic (on both S4 and S5) is an modification that you have to perform yourself. So is airpump activation on S4.
S5 is air pump activation on both VDI and 6PI.
S4 is exhaust backpressure activation for 6PI. S4's do not have VDI.
electronic (on both S4 and S5) is an modification that you have to perform yourself. So is airpump activation on S4.
S5 is air pump activation on both VDI and 6PI.
