Shorty headers? Sound difference?
08-08-2010, 08:46 PM
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2016 Chevrolet SS, 2006 Cadillac STS-V
Shorty headers? Sound difference?
I have a few questions about shorty headers. I've never used headers before so I don't have any experience with them. I know long tubes are the way to go, but I don't really want to spent thousands on headers, cats, and custom exhaust work. What companies make a short header for the C55 that will retain my stock primary cats? Is worth installing shorty headers? Anything has to be better than stock manifolds, but what kind of gains could be expected in power and sound?
08-08-2010, 10:36 PM
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2013 C63 AMG P31, 2014 GMC Sierra (6.2)
I have a few questions about shorty headers. I've never used headers before so I don't have any experience with them. I know long tubes are the way to go, but I don't really want to spent thousands on headers, cats, and custom exhaust work. What companies make a short header for the C55 that will retain my stock primary cats? Is worth installing shorty headers? Anything has to be better than stock manifolds, but what kind of gains could be expected in power and sound?
AMS and Evosport both make bolt on shortys for the C55. Both are sponsors of this site. There is also Renntech that make a set of shortys but at much greater $$$. I haven't done a dyno with shortys but from what I've read - 8 to 15 rwhp on our naturally aspirated 5.5 engine....
08-09-2010, 12:01 AM
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I gained about 48 rwhp from kleemann mid length headers, tune and deleting my secondaries.
AMS says that with shorties and deleting the primaries you can get similar gains to getting mid length headers.
The sound though from my car is ridiculous in person though. See my dyno vid in my signature but it doesn't do it any justice.
AMS says that with shorties and deleting the primaries you can get similar gains to getting mid length headers.
The sound though from my car is ridiculous in person though. See my dyno vid in my signature but it doesn't do it any justice.
08-09-2010, 10:28 AM
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2016 Chevrolet SS, 2006 Cadillac STS-V
I gained about 48 rwhp from kleemann mid length headers, tune and deleting my secondaries.
AMS says that with shorties and deleting the primaries you can get similar gains to getting mid length headers.
The sound though from my car is ridiculous in person though. See my dyno vid in my signature but it doesn't do it any justice.
AMS says that with shorties and deleting the primaries you can get similar gains to getting mid length headers.
The sound though from my car is ridiculous in person though. See my dyno vid in my signature but it doesn't do it any justice.
The AMS headers look more like manifolds made from tubing, doesn't look like much gain is to be had. Unless I missed them the Evo headers are designed for the kompressor cars.
08-09-2010, 06:17 PM
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None fast enough!
No, the coating is critical for our lifetime warranty as well as maximizing performance. The coating adds another 3-5 whp gain.
thanks
Brad
thanks
Brad
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08-09-2010, 06:33 PM
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08-09-2010, 06:39 PM
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Ah, I have to have cats to pass emissions.
