SLP New headers or ARH?
Thread Starter
On The Tree
Joined: Jan 2008
Posts: 108
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From: connecticut
SLP New headers or ARH? Hi guys, I'm about to buy headers for my 99 formula, can't decide what header to go with. I want to go catted-y set-up, either American Racing with catted-y, or SLP new design headers. Both these headers seem very similar, and the price is about the same, and if I went American Racing, would it hook into an SLP cat-back exhaust loudmouth 1? Thanks.
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
Well, the SLP's are nice because you get coating with the price. But, the ARH come with merge collectors and the SLP's do not. The ARH y-pipe is a little better IMO just by looking at it, but I've never handled either of them in person.
The price is a moot point since they're roughly the same. Ask yourself what you'd rather have: coating or merge collectors. Based on your answer, make your decision.
The price is a moot point since they're roughly the same. Ask yourself what you'd rather have: coating or merge collectors. Based on your answer, make your decision.
TECH Regular
Joined: May 2008
Posts: 458
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From: Marissa, Il
I have SLP with Catted y-pipe into SLP LM1 and It sounds good to me. It is very loud, but I like it. As far as making a decision, I would do as the OP said. Stainless with ceramic coating or the merge.
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Thread Starter
On The Tree
Joined: Jan 2008
Posts: 108
Likes: 0
From: connecticut
Thanks for posting, I was wondering if you have any sound clips of your setup? I'm just wondering how much louder your car got from when you had your loudmouth 1, and when you added your SLP new headers. Thanks.
TECH Regular
Joined: May 2008
Posts: 458
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From: Marissa, Il
http://www.cardomain.com/ride/3022039
There are videos of it. I went from stock to cutout to SLP headers/cats/ypipe/cutout/stock ws6 catback to Full SLP exhaust. But on my 98 SS I had stock manifolds/cats/ypipe with loudmouth and loved it. My WS6 setup is quite a bit louder than the SS.
There are videos of it. I went from stock to cutout to SLP headers/cats/ypipe/cutout/stock ws6 catback to Full SLP exhaust. But on my 98 SS I had stock manifolds/cats/ypipe with loudmouth and loved it. My WS6 setup is quite a bit louder than the SS.
I had ARH catted LT's and a TSP rumbler which is basically the loudmouth. It sounded like ****. Way too raspy and loud. It only sounded good idling and above 4k RPMS. Your probably going to want a regular muffler on the system to clean up the sound, like the hooker or magnaflow catbacks.
I am uncertain of difference in LM1 and LM2, but I had the original LM for my formula with Kooks headers and catted y, and it sounded like a post above, awesome at idle, but at some parts at WOT would just be way to raspy and was EXTREMELY loud especially if you got a manual and letting it wind down. LOL
I'm definitely gonna go with ARH as soon as the $ comes available.
I'm definitely gonna go with ARH as soon as the $ comes available.
Thread Starter
On The Tree
Joined: Jan 2008
Posts: 108
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From: connecticut
http://www.cardomain.com/ride/3022039
There are videos of it. I went from stock to cutout to SLP headers/cats/ypipe/cutout/stock ws6 catback to Full SLP exhaust. But on my 98 SS I had stock manifolds/cats/ypipe with loudmouth and loved it. My WS6 setup is quite a bit louder than the SS.
There are videos of it. I went from stock to cutout to SLP headers/cats/ypipe/cutout/stock ws6 catback to Full SLP exhaust. But on my 98 SS I had stock manifolds/cats/ypipe with loudmouth and loved it. My WS6 setup is quite a bit louder than the SS.
Thread Starter
On The Tree
Joined: Jan 2008
Posts: 108
Likes: 0
From: connecticut
catted y pipe? right now I am making 327 rwhp and 343 tq once I get
these headers on I will get my car tuned again. Thanks.
1999 formula m6 slp catback loud mouth 1, ls6 intake, slp ram air tune
327 rwhp 343 tq.
TECH Fanatic
Joined: Sep 2005
Posts: 1,293
Likes: 1
From: Fredericksburg Va
I had the loudmouth 1 with the new SLP Y without headers, then I installed the ARH with their catted Y into the loudmouth 1 which in my opinion took out the rasp and drone that so many complain about. I love the ARH with their catted Y. This thread I'm posting for you was my thread in how pleased I was and am with the quality of the ARH. There are 2 sound clips soon as the headers were installed, and 2 sound clips going down the road while inside the car. I was not at wot, and shifting was done easy.
https://ls1tech.com/forums/generatio...installed.html
https://ls1tech.com/forums/generatio...installed.html
The fit & finish on the ARH's is second to none...as for the SLP's, well they had to 'improve' on their original horrible/low-hanging/lengthy install header design.
Customer service is a huge attribute as well, when was the last time you seen SLP posting???
Personally, I find most of SLP's stuff wayyy over priced and much better products can be found for the same or less out of pocket
