Any Issue With These Headers?
Thread Starter
Teching In
Joined: Mar 2015
Posts: 35
Likes: 0
From: Chicago, IL
Any Issue With These Headers? Currently have stock cats, an SLP Off Road Y-Pipe, and an SLP Loudmouth Exhaust. Gonna finally purchase some headers to complete the exhaust setup. Was thinking of getting Speed Engineering 1 7/8'' Long Tube Headers. Will these pair alright with the rest of my setup?
How much would it benefit me to get race cats? Gonna get a tune after I install them so I could have them delete any DTC's so I can pass emissions but I don't wanna go the trouble of spending the money & installing them if they're not gonna net me much.
How much would it benefit me to get race cats? Gonna get a tune after I install them so I could have them delete any DTC's so I can pass emissions but I don't wanna go the trouble of spending the money & installing them if they're not gonna net me much.
Wouldn't the off road SLP y pipe not have any cats?
I'm assuming you have stock manifolds. If so the speed engineering headers would be a nice upgrade. But I don't know if they would work with your y pipe.
I'm assuming you have stock manifolds. If so the speed engineering headers would be a nice upgrade. But I don't know if they would work with your y pipe.
Thread Starter
Teching In
Joined: Mar 2015
Posts: 35
Likes: 0
From: Chicago, IL
Gotcha...bummer. Alright, I can get the Speed Eng. Y-Pipe as well. Should I get race cats then or am I still good with stock? Will the Speed Y-Pipe mate with my stock cats? Is it worth it to get the race cats or is their little to no benefit?
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
You may be able to use that Y-pipe if you cut it and install 3">2.5" collector merges. Whether you do that or buy the Speed Y, you'll have to cut the Y to weld in your cats. Stock cats will not work with long tubes.
Cats will eliminate exhaust smell and mellow out rasp at the cost of a few hp. Whether that would make it worth it for you to install them is strictly a subjective decision. If you do go with cats, I recommend Magnaflow metallic core, although others have used Thunderbolt and other brands and have been happy.
Cats will eliminate exhaust smell and mellow out rasp at the cost of a few hp. Whether that would make it worth it for you to install them is strictly a subjective decision. If you do go with cats, I recommend Magnaflow metallic core, although others have used Thunderbolt and other brands and have been happy.
Trending Topics
Thread Starter
Teching In
Joined: Mar 2015
Posts: 35
Likes: 0
From: Chicago, IL
So I've decided to just take the cats out completely, run the headers to the Y and then will my SLP Exhaust plug straight into the Speed Eng. Y? Also, if I tune out the cats will I pass emissions if I have the rear o2's & AIR tuned out? I don't have visual inspection, just OBD scan.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Thread Starter
Teching In
Joined: Mar 2015
Posts: 35
Likes: 0
From: Chicago, IL
Gonna get it tuned right after I install it...will it still smell like gas? This is my DD so I don't want my wife to complain all the time or to smell like gas all the time. What would you guys recommend as a high-flow catted y-pipe?
I would rather just purchase a high-flo catted y off the jump rather than cutting the speed Y to fit the cats since I'm not sure I'd be able to do that myself.
I would rather just purchase a high-flo catted y off the jump rather than cutting the speed Y to fit the cats since I'm not sure I'd be able to do that myself.
Thread Starter
Teching In
Joined: Mar 2015
Posts: 35
Likes: 0
From: Chicago, IL
Would the Texas Speed Performance Catted 3'' Y-Pipe mate with my SLP LM Exhaust and the Speed Eng 1 7/8'' Headers?
Do I still have to buy O2 Extensions if I'm gonna tune out the rear O2's?
Do I still have to buy O2 Extensions if I'm gonna tune out the rear O2's?
Last edited by pacorocco6; Oct 16, 2015 at 12:04 PM.