LS2 swap exhaust size?
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LS2 swap exhaust size? I'm finishing up an LS2/4L65E swap into a '72 C10.
Donor was a '06 GTO.
I swapped in a Summit stage 2 turbo cam and running NA, cam selection based off summit tech suggestion. Also the recommended springs and pushrods.
It's got some ebay shorty headers with 1 5/8 primaries and 2 1/2" collectors.
Taking it to the exhaust shop to get it done saturday, hopefully have it running sunday.
Question is the exhaust shop guy says 2 1/2" duals to a dual in dual out single muffler (due to space) would be fine.
Not sure of the power it'll make but I want to set the rev limiter to 6800 and it'll probably see it. It has a 3600 stall speed converter and 4.10 gears.
Does this sound right or should I step up to 3" duals and two single mufflers? Trying not to do this twice. Thanks in advance.
Donor was a '06 GTO.
I swapped in a Summit stage 2 turbo cam and running NA, cam selection based off summit tech suggestion. Also the recommended springs and pushrods.
It's got some ebay shorty headers with 1 5/8 primaries and 2 1/2" collectors.
Taking it to the exhaust shop to get it done saturday, hopefully have it running sunday.
Question is the exhaust shop guy says 2 1/2" duals to a dual in dual out single muffler (due to space) would be fine.
Not sure of the power it'll make but I want to set the rev limiter to 6800 and it'll probably see it. It has a 3600 stall speed converter and 4.10 gears.
Does this sound right or should I step up to 3" duals and two single mufflers? Trying not to do this twice. Thanks in advance.
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Joined: Mar 2005
Posts: 663
Likes: 384
From: South Carolina
I'd replace the shorties with those tiny 1-5/8" primaries with a set of Speed Engineering LS longtubes for the C-10. They offer both the 1-3/4 and 1-7/8" primaries, it's worth the extra $30 for the larger set. That camshafts operating range is 3000-7000 RPM and with the LS2's good 243/799 heads those shorties are going to be a bottleneck.
to answer your question I'd go with a pair of 5 X 8 Magnaflows in either 14", 18" or 24" length depending on how loud you want the truck. My 2000 GMC has limited room also but was able to fit a pair of 3" inlet/outlet 14" Magnaflows. After a year or so when the muffler packing was "broken in" it was a little louder than when they were installed. Added a couple of Vibrant Resonators to quieten it down somewhat more to my liking.
Attachment 713565
to answer your question I'd go with a pair of 5 X 8 Magnaflows in either 14", 18" or 24" length depending on how loud you want the truck. My 2000 GMC has limited room also but was able to fit a pair of 3" inlet/outlet 14" Magnaflows. After a year or so when the muffler packing was "broken in" it was a little louder than when they were installed. Added a couple of Vibrant Resonators to quieten it down somewhat more to my liking.
Attachment 713565
