LS Swap Exhaust

[1981_c10]

What are you guys doing for exhaust for your LS swap? I am running 5.3 ls with speed engineering long tube headers.

I have looked at speed engineering kit and hooker blackheart but just havent heard them before so trying to get some feedback before choosing what i want.

Goal: have a nice rumble for shows but i plan to drive and dont want it crazy loud in the cab when going down highway.

[cdub2010]

I used the speed engineering swap headers with a 2.5 inch stainless bend kit. I cut and welded up my exhaust with Summit racing 409 stainless 2.5 mufflers 14 inch long i believe and 3" flowmaster prebent tailpipes on my '77 k20 5.3. I didnt put in a x or h pipe, just true duals, because I was in a hurry to get it done. It sounds fine, gets noticed with the stock cam but it think its a bit loud at wide open. I dont think ls engines sound have a good sound anyways, so its all personal preference.
It cruises nice on the highway at 80, no drone or buzzing. Ive done 600 mile trips several times and its quite enough for what it is.

[rodstored-72]

I have a '13 (gen IV) in a '86 C10 and I used Pacesetters "shorty (block hugger) headers and the stock cats (w/ all 4 O2 sensors) and had a muffler shop do a "custom" exhaust with Xpipe and exit each side in front of rear tires.

[mongocanfly]

I'm running headers and duals on mine..turned down in front of rear axle..
Not crazy loud, but has good tone..
The are magnaflow knockoffs, called magflow, they've since changed the name to maxflow..

[Nick_R_23]

Gen 5 Camaro manifolds.

[TotallyHucked]

I'll see if I can get some videos posted too. I've got an '85 with the 5.3 with Speed Engineering 1 3/4" headers. I bought an amazon X-pipe piece and a pair of Borla ProXS mufflers. Had an exhaust shop bend me up a custom 2.5" exhaust all the way out the back. Sounded really good, had a mellow idle but a very unique sound at WOT



The ProXS's started droning worse and worse as time went on until I couldn't stand it anymore. So when I swapped in the T56, I swapped to some universal Corsa's mounted behind the axle. They're entirely too loud on the outside but they're very quiet inside. Gonna add some resonators to tone it down a touch and calm down the part throttle "clap" they have but overall this is much better than the first setup

[TotallyHucked]

Here's the old setup with the Borla's when they were knew. Didn't even have 10mi on the swap at this point lol

https://www.youtube.com/watch?v=I8TjMq0IDR4


Here's the current setup with the Corsa's, I don't have any outside video at this point

https://www.youtube.com/shorts/SLn3uW5zBQY

[dagnabbitt]

Originally Posted by TotallyHucked

Here's the old setup with the Borla's when they were knew. Didn't even have 10mi on the swap at this point lol

https://www.youtube.com/watch?v=I8TjMq0IDR4


Here's the current setup with the Corsa's, I don't have any outside video at this point

https://www.youtube.com/shorts/SLn3uW5zBQY

That sounds pretty great.

[1981_c10]

Help please!

I bought the speed engineering 3 inch kit with x pipe that is designed to run with their long tube swap headers, their trans mount and 4el60....tried putting on yesterday and fitment is less than ideal.

Any one put this kit on? My x pipe dives down pretty hard under the drive shaft causing the rear portion of the system to sit very low which can be seen from the side....

Tried calling customer support to ask for instructions, pictures and guidance, to everyone's surprise...yeah they didnt help at all.

[kglowacky]

I just ran factory set up I bought from Summit and had a muffler shop adapt them to the exhaust manifold. Very quiet but as years and miles go by they are getting louder .

[WorldsCrappiestTruck]

Originally Posted by 1981_c10

Help please!

I bought the speed engineering 3 inch kit with x pipe that is designed to run with their long tube swap headers, their trans mount and 4el60....tried putting on yesterday and fitment is less than ideal.

Any one put this kit on? My x pipe dives down pretty hard under the drive shaft causing the rear portion of the system to sit very low which can be seen from the side....

Tried calling customer support to ask for instructions, pictures and guidance, to everyone's surprise...yeah they didnt help at all.

Do you need to angle-up the whole driveline a couple degrees to allow the X pipe to sit higher? A different transmission mount?

The angle of the headers will drive the “height” of the x-pipe. The angle of the engine & trans will drive the angle of the headers.

[1981_c10]

Originally Posted by WorldsCrappiestTruck

Do you need to angle-up the whole driveline a couple degrees to allow the X pipe to sit higher? A different transmission mount?

The angle of the headers will drive the “height” of the x-pipe. The angle of the engine & trans will drive the angle of the headers.

Vendor recommends using their trans mount they sent which is flat. From headers pipes jump over trans crossmember then dive under driveshaft and connect the x pipe right at yoke. x pipe is just angled down pretty hard. thinking i will have to take to a shop to fit properly...so much for bolt in.

[Hart_Rod]

I used the Blackheart kit on my LT engine swap with the hooker manifolds and it bolted right in.

[Loco83]

Nice.