Magnaflow SSS 6.0l catback on My 5.3 ext cab k1500
05-06-2005, 12:59 AM
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Magnaflow SSS 6.0l catback on My 5.3 ext cab k1500
Finally Done, Thanks Magnaflow, Klugss and The Rock;
I put an entire Silverado SS exhaust on My 2003 GMC Sierra K1500 5.3 ext Cab. It didn't require any cutting or welding just some misc GM parts.
So for those who want some tame Duals and don't have to means to have it custom made, here's my bolt on version.
The first thing was to find 6.0l manifolds because the pasenger side collector flange differs slightly from the 5.3. I also had to obtain a 6.0l tranny- heat shield bracket. It acts as an exhaust Hanger as well.
Magnaflow (off the shelf Cat back) meant for a Silverado SS, part 15840
It features dual 2.5" pipes all the way back with two resonators under the cab for the drone.The system also uses a cross Flow Muffler to balance out the dual pipes.Fits on a k1500 with no problem, Granted you need the 6.0 cat pipes to match up or a custom shop to split the factory Y Pipe.
Before and after shot;
Sounds pretty quiet compared to My step side but all in all I like it for the daily Hog.I would of like to gone with headers but couldn't swing it right now. I had the factory **** coated due to the horrible salt up here.
Plus it looks cool.
I'm going to the dyno to see some after results. I'm not expecting alot but at least the exhaust is ready for a lot more than the 5.3 will give it for now.
I put an entire Silverado SS exhaust on My 2003 GMC Sierra K1500 5.3 ext Cab. It didn't require any cutting or welding just some misc GM parts.
So for those who want some tame Duals and don't have to means to have it custom made, here's my bolt on version.
The first thing was to find 6.0l manifolds because the pasenger side collector flange differs slightly from the 5.3. I also had to obtain a 6.0l tranny- heat shield bracket. It acts as an exhaust Hanger as well.
Magnaflow (off the shelf Cat back) meant for a Silverado SS, part 15840
It features dual 2.5" pipes all the way back with two resonators under the cab for the drone.The system also uses a cross Flow Muffler to balance out the dual pipes.Fits on a k1500 with no problem, Granted you need the 6.0 cat pipes to match up or a custom shop to split the factory Y Pipe.
Before and after shot;
Sounds pretty quiet compared to My step side but all in all I like it for the daily Hog.I would of like to gone with headers but couldn't swing it right now. I had the factory **** coated due to the horrible salt up here.
Plus it looks cool.
I'm going to the dyno to see some after results. I'm not expecting alot but at least the exhaust is ready for a lot more than the 5.3 will give it for now.
05-06-2005, 10:58 PM
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Originally Posted by Zick
Looks sweet 
Any chance you can get a sound clip? Just wondering how loud and deep it sounds.
Any chance you can get a sound clip? Just wondering how loud and deep it sounds.
I'll shoot some exterior shots too.
After two days its sounding better and better.
No drone, Throttle feels good and has a nice deep tone.
The Magnaflow system bolted together very well, I'm real happy with the quality. I might weld a couple of seems now that the system is bolted up and fitting good.
05-07-2005, 09:23 AM
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Originally Posted by tdrumm
Looks great man, can't wait for the after numbers. Will you be coming back down to Jersey next dyno day?
05-08-2005, 03:49 AM
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Hey, how much for the heat-shield? This is one of the first posts with the details for the swap Ive seen and it looks like a sweet deal. The kicker is you say that its a bolt on deal. If it all goes well I hope to get the 6.0 headers at the same time I get the catback (SuperMaxx & Billy Boat 
). What did u pay for the coating?
). What did u pay for the coating?
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05-08-2005, 07:23 AM
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Originally Posted by straped for cash
Hey, how much for the heat-shield? This is one of the first posts with the details for the swap Ive seen and it looks like a sweet deal. The kicker is you say that its a bolt on deal. If it all goes well I hope to get the 6.0 headers at the same time I get the catback (SuperMaxx & Billy Boat ). What did u pay for the coating?
). What did u pay for the coating?The heat shield comes with the rubber hanger,
GM part #150714111,
I bought it used.
You wont' need it if you do the SupermaXX headers.
I asked others who have a Silverado SS, Sierra Denali with the Supermaxx system and they said the bracket was uneeded.
As far as coating it was $150
Again this is a bolt on deal on a k1500 ext cab.
05-08-2005, 11:56 AM
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I did something similar for mine, a bit pricier though
Went with the 6.0 version of the Dynatech SuperMaxx system with a 6.0 version of the Borla catback. I LOVE it. Nothing sounds sweeter than longtubes with true duals.
Went with the 6.0 version of the Dynatech SuperMaxx system with a 6.0 version of the Borla catback. I LOVE it. Nothing sounds sweeter than longtubes with true duals.