Longtube headers... Cats or No Cats?
09-01-2016, 01:26 PM
#41
Melting Slicks
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Huskerman,
1 3/4" for normally aspirated engines, 1 7/8" for forced induction. The larger headers will work and give a little more power, just later in the rpm range. The 1 3/4" will give you a little more torque lower in the power band.
1 3/4" for normally aspirated engines, 1 7/8" for forced induction. The larger headers will work and give a little more power, just later in the rpm range. The 1 3/4" will give you a little more torque lower in the power band.
09-01-2016, 01:31 PM
#42
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LG Streets will produce more power from a bolton than the pros.
Z06 manifolds, cats, and H or X-pipe necked down to 2.5" at the rear, will produce about 2/3 the power of headers.
Don't forget that more air in and out, should include a tune too.
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mikeCsix (09-01-2016)
09-01-2016, 01:45 PM
#43
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Husky they gave you good advice. I have LG streets in 1 3/4 with their high flow cats. They are in my neck of the woods so they did the install and tune back in 08. No problems at all except the crappy tailpipe clamps GM uses.
If I had it to do again I would get them ceramic coated. As it is I changed the plug wires to high heat ones and put on kevlar boots. I also removed the hood weatherstripping up by the cowl to let some heat out.
If I had it to do again I would get them ceramic coated. As it is I changed the plug wires to high heat ones and put on kevlar boots. I also removed the hood weatherstripping up by the cowl to let some heat out.
09-01-2016, 07:03 PM
#44
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so......LG's or ARH.....or Kook's...........which are the favored by the chosen one's......in modern times not back in year 12? 10-4 on the ceramic I had those on my C4 and they did a good job......
Last edited by Huskerman; 09-01-2016 at 07:04 PM.
09-01-2016, 07:35 PM
#45
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09-01-2016, 08:40 PM
#46
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09-01-2016, 11:06 PM
#47
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.....ok.......so only confusing answers so I am going to just pick the LG Streets........hope I'm right.......
got a baser to beat.....
got a baser to beat.....
Last edited by Huskerman; 09-01-2016 at 11:07 PM.
05-01-2018, 09:22 PM
#48
No cats gives you a more raw throaty race car sound. I've always preferred no cats on any sports car I've owned. But like said, it depends on your setup. My last 08 Vette I had LG Street Longtubes, X pipe, no cats, and an SLP Loudmouth 1 axle-back. It would wake the dead but I loved it. And as for the smell, it's not too noticeable. It never bothered me but then again it's the smell of performance lol
http://www.youtube.com/watch?v=PPxfPvXDqIE
http://www.youtube.com/watch?v=PPxfPvXDqIE
05-01-2018, 09:42 PM
#49
Pro
Kooks 1 7/8 long tube headers off road X pipe and Borla S type II axle back. No drone, not to loud. Can have a normal conversation or listen to radio. But you probably won't have the radio on because you'll love hearing those pipes with no cats. That's if you don't have to pass emissions. I don't understand people complaining that the smell is so terrible. Only time I smell it if I leave it running in the garage. And if you go with cats it not only cost you some HP you will have to replace them eventually. And even 5 or 6 HP it too much. You can never have enough.
Last edited by ONEBADZ; 05-01-2018 at 09:47 PM. Reason: Correction
05-01-2018, 09:49 PM
#51
Burning Brakes
Kooks 1 7/8 long tube headers off road X pipe and Borla S type II axle back. No drone, not to loud. Can have a normal conversation or listen to radio. But you probably won't have the radio on because you'll love hearing those pipes with no cats. That's if you don't have to pass emissions. I don't understand people complaining that the smell is so terrible. Only time I smell it if I leave it running in the garage. And if you go with cats it not only cost you some HP you will have to replace them eventually. And even 5 or 6 HP it too much. You can never have enough.
05-01-2018, 09:55 PM
#52
Pro
And why would you want to have to replace them when they go bad?
Last edited by ONEBADZ; 05-01-2018 at 09:58 PM. Reason: Added
05-01-2018, 10:45 PM
#53
Pro
Without question, go with Cats.
Cats only cost you 4-6hp (aftermarket metal matrix cats). It is nowhere near worth the down sides. Between the black soot on the fascia, and raw fuel smell, its not worth it. Plus, if you already have an aggressive exhaust it will get very very loud. Especially the drone.
Cats only cost you 4-6hp (aftermarket metal matrix cats). It is nowhere near worth the down sides. Between the black soot on the fascia, and raw fuel smell, its not worth it. Plus, if you already have an aggressive exhaust it will get very very loud. Especially the drone.
That's the honest truth and not my opinion.
05-01-2018, 10:57 PM
#54
Burning Brakes
Personally, I'm undecided, but am leaning towards going catless. The likely hood of high performance cats going bad on a NA is low, however on a SC engine it's another story, from what I've been told.
I'm presently stock with the mild to wild and would like it noisier at idle and while accelerating, but am concerned with drone on road trips when I add headers 3" crossovers, no cats, cam and Akrapovic axle backs w/ 5" cf tips.
05-01-2018, 11:05 PM
#55
Burning Brakes
I had a 1969 Vette back in the mid 70's w/ a lopey idle and never had a problem with bad smell/odor and that was with a carbureted engine. I believe a good tune should eliminate the raw gas smell and any black soot!
05-01-2018, 11:20 PM
#56
Pro
Personally, I'm undecided, but am leaning towards going catless. The likely hood of high performance cats going bad on a NA is low, however on a SC engine it's another story, from what I've been told.
I'm presently stock with the mild to wild and would like it noisier at idle and while accelerating, but am concerned with drone on road trips when I add headers 3" crossovers, no cats, cam and Akrapovic axle backs w/ 5" cf tips.
I'm presently stock with the mild to wild and would like it noisier at idle and while accelerating, but am concerned with drone on road trips when I add headers 3" crossovers, no cats, cam and Akrapovic axle backs w/ 5" cf tips.
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TomdaToolman (05-01-2018)
05-01-2018, 11:29 PM
#57
Pro
It did have more of a smell than my 11 does but again I only noticed it when it was running in the garage or when standing outside of it while running. It wasn't very bad inside the car even with the T tops off.
06-13-2019, 12:01 PM
#58
No cats gives you a more raw throaty race car sound. I've always preferred no cats on any sports car I've owned. But like said, it depends on your setup. My last 08 Vette I had LG Street Longtubes, X pipe, no cats, and an SLP Loudmouth 1 axle-back. It would wake the dead but I loved it. And as for the smell, it's not too noticeable. It never bothered me but then again it's the smell of performance lol
http://www.youtube.com/watch?v=PPxfPvXDqIE
http://www.youtube.com/watch?v=PPxfPvXDqIE
06-13-2019, 05:41 PM
#59
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You will be disappointed with the LG headers. I know everyone has their own opinion, but ARH and Kooks are the top header choices. Customer service with LG is horrible as well. They also changed their way of making the headers and it's not as good of material.
All that said, each vette is different and so is the owner so to each their own.
My setup: ARH 1-3/4 headers, 3" x pipe, no cats, B&B bullets. Very aggressive, very throaty, but the best overall parts and gains in power.
No cats you'll have some smoke at WOT, and it'll be louder, the smell of fuel will only be at WOT as well, but that's behind you so you won't notice it anyway....
At the end of the day it's whatever you want for what you do, and if emissions matters....
All that said, each vette is different and so is the owner so to each their own.
My setup: ARH 1-3/4 headers, 3" x pipe, no cats, B&B bullets. Very aggressive, very throaty, but the best overall parts and gains in power.
No cats you'll have some smoke at WOT, and it'll be louder, the smell of fuel will only be at WOT as well, but that's behind you so you won't notice it anyway....
At the end of the day it's whatever you want for what you do, and if emissions matters....
Customer service with LG is horrible as well!!!!!
They sent the wrong size clamps for LG Headers and they tried to blame shop. 2 3/4 clamps will never fit 3inch tubing!
I had to spend the night in hotel as LG Motorsports could not overnight the correct clamps!
LG Motorsports would NOT reimburse my hotel bill!!!
Last edited by JD C6; 06-13-2019 at 05:42 PM.
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southofHoustonVette (06-15-2019)
