GS460 Headers
02-16-22, 05:07 PM
#1
Advanced
Thread Starter
02-17-22, 04:13 PM
#3
Intermediate
I'm a little upset about the price, as they were originally priced at $1600. Inflation and supply chain issues aside, that just seems predatory.
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hunterhill (02-21-22)
02-17-22, 08:05 PM
#6
02-18-22, 02:24 PM
#7
Advanced
Thread Starter
Remember that it takes money and time to research, design, and manufacture these. So that has to be factored into the cost. Also remember that the GS460 is very rare, so not a lot of people will be ordering these, relatively. I think the price is fair, all things considering.
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02-19-22, 12:30 AM
#8
Remember that it takes money and time to research, design, and manufacture these. So that has to be factored into the cost. Also remember that the GS460 is very rare, so not a lot of people will be ordering these, relatively. I think the price is fair, all things considering.
02-19-22, 02:15 PM
#9
Intermediate
After reading the dyno graph looks like the 460 only picked up 10hp with just the headers, the big gain was when the catalytic were removed. If you havent bypassed your cats, maybe consider building a "test pipe" to bypass the cats. I looked up the exhaust manifold on a 460 and the larger cats are welded to the manifolds tube. Maybe purchase a flange, unbolt and cut off the cat, weld the flange and make up a test pipe in between. That way you can easily go back to stock mode if needed.
Last edited by TreysGS460; 02-19-22 at 02:49 PM.
02-20-22, 04:02 AM
#10
The headers with no cats show a 38-46whp gain
The headers with high-flow cats show a 28-33whp gain
The ad does not say how much hp the headers make on stock cats. It shows on high flow cats, making anywhere from 28-33 whp. The headers do make better top end, not sure if thats from the header or because it has no cats. How much is the header alone making 10,15hp?
02-20-22, 01:34 PM
#11
Intermediate
Sorry not in the dyno, but in the description it says:
The headers with no cats show a 38-46whp gain
The headers with high-flow cats show a 28-33whp gain
The ad does not say how much hp the headers make on stock cats. It shows on high flow cats, making anywhere from 28-33 whp. The headers do make better top end, not sure if thats from the header or because it has no cats. How much is the header alone making 10,15hp?
The headers with no cats show a 38-46whp gain
The headers with high-flow cats show a 28-33whp gain
The ad does not say how much hp the headers make on stock cats. It shows on high flow cats, making anywhere from 28-33 whp. The headers do make better top end, not sure if thats from the header or because it has no cats. How much is the header alone making 10,15hp?
That being said, I think you're misunderstanding the information. The headers come without cats, so you can say that the headers ALONE make 38-46whp on an ISF.
I think what you're thinking about is losing 10whp from adding on HF cats, right? Down to 28-33whp, on the ISF?
I'm not sure how many people have installed PPE headers and welded back in the primaries which are pretty restrictive, likely a 5whp loss over HF cats
As for these headers on a GS460, I think we've only seen one before and after dyno, BUT he has cats, not sure if they are HF or factory, but I believe he gained around 20whp max, and with good gains throughout the powerband
Last edited by TreysGS460; 02-20-22 at 01:55 PM.
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jgscott (02-21-22)
02-20-22, 02:13 PM
#12
That being said, I think you're misunderstanding the information. The headers come without cats, so you can say that the headers ALONE make 38-46whp on an ISF.
I think what you're thinking about is losing 10whp from adding on HF cats, right? Down to 28-33whp, on the ISF?
You are correct in that description is from an ISF, its the same dyno charts aswell with the same power figures. if you look at the design of the stock GS460 exhaust manifolds it looks super restrictive, especially vs the LS460 which has more runners then 1 single tube out of the. It appears they want you to weld on a flange to your stock cats, to make it a bolt on deal.
I wonder if someone took used LS460 headers, chopped off the cats, and just straight piped or welded on high flow headers to the end of it. You would end up with a setup less restrictive, you would save money vs buying a $2,100 header that you already have to weld. If it came with high flow header that would atleast justify the price, and would make it a true bolt on deal.
02-20-22, 02:22 PM
#13
Honestly having done long tube headers on other cars I've owned. Especially one with log style oem manifolds. I had zero issue paying more for these headers. Price is up there. Though that's more a sign of the times than directly on PPE.
As far as the LS manifolds go. I am curious if they tend to fail like the isf manifolds. To which they are somewhat closely related.
As far as the LS manifolds go. I am curious if they tend to fail like the isf manifolds. To which they are somewhat closely related.
02-20-22, 02:49 PM
#14
Honestly having done long tube headers on other cars I've owned. Especially one with log style oem manifolds. I had zero issue paying more for these headers. Price is up there. Though that's more a sign of the times than directly on PPE.
As far as the LS manifolds go. I am curious if they tend to fail like the isf manifolds. To which they are somewhat closely related.
As far as the LS manifolds go. I am curious if they tend to fail like the isf manifolds. To which they are somewhat closely related.
The LS 2007-2013 RWD is a 4 to 2 to 1 vs the GS short block 4 to 1 so more likely you guys will gain power. Used parts for the LS are plentiful at junkyards. You might be able to score a used pair for under $200, chop off the cats install them and take the car to an exhaust shop and have them weld high flow cats.
02-20-22, 02:50 PM
#15
Intermediate
What I understood from there description is 38-46 whp with no cats, meaning full race straight piped vs high flow cats 28-33 whp. They did not list stock cats figures!
You are correct in that description is from an ISF, its the same dyno charts aswell with the same power figures. if you look at the design of the stock GS460 exhaust manifolds it looks super restrictive, especially vs the LS460 which has more runners then 1 single tube out of the. It appears they want you to weld on a flange to your stock cats, to make it a bolt on deal.
You are correct in that description is from an ISF, its the same dyno charts aswell with the same power figures. if you look at the design of the stock GS460 exhaust manifolds it looks super restrictive, especially vs the LS460 which has more runners then 1 single tube out of the. It appears they want you to weld on a flange to your stock cats, to make it a bolt on deal.
We have a solution that works and makes great gains compared to OEM, can we move the "modifying other headers to fit" to another thread?
Last edited by TreysGS460; 02-20-22 at 03:05 PM.
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Bastrd6 (02-20-22)