Corsa cat back/long tube header neck down - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jimmyfreeze · 03-11-2024, 01:15 AM

Been lurking around for a long time, first post. Wondering if anyone has a better idea on how to go from stock manifold/converters with corsa 3" cat back to longtubes, corsa back...WITHOUT necking it down?

My long tubes are stainless works which have "factory connect" and "performance connect" versions. Before ordering headers, I called sw tech support and they recommended the Performance connect since I already had Corsa cat back and I did NOT want a neck down going from 3" to 2.5" then back to 3" cause that would drive me nuts knowing even if it doesn't change performance. He did tell me there would be some fabrication no matter what.

See photos. The straight pipe from the headers to the corsa elbow is 3" x 18" separate piece I bought to make it work. Car is offroad only if anyone is wondering why I didn't install the high flow cats included with the sw kit.

MSgt O · 03-11-2024, 07:56 AM

Just weld in 3" pipe...I guess Im not following the issue here?

CamaroDreams76 · 03-11-2024, 10:31 AM

Vibrant Performance sells 3in pipe and 3in connections.

jimmyfreeze · 03-11-2024, 11:48 PM

Quote:

Originally Posted by MSgt O

Just weld in 3" pipe...I guess Im not following the issue here?

Mig not setup to weld stainless, don't have a tig, and I want the clamp connection so it's easy to put install the high flow cats that came with the headers for street.

jimmyfreeze · 03-11-2024, 11:58 PM

Done. Brazed in wide band bungs with Braze 560 silver rod.

jimmyfreeze · 03-13-2024, 01:40 AM

Moving on to gearing changes, decided on a Yukon 4.11 setup with truetrac. Almost went with the JRE but the price is $4461 to ship a rebuilt diff complete which is ridiculous so I'm doing my own upgrade. Bought a 3.27 diff that no one wanted on ebay for cheap, tore it apart today...all good.
Waiting on parts now, but total cost with ebay diff, yukon 4.11 gear kit, yukon master rebuid kit, and truetrac is $2646 total. Prob go with the hendrix bushings so add $175, maybe cover. Nice to be able to take my time with the spare diff and sell my stock 3.45 after the swap out.

03-11-2024, 01:15 AM	#1
jimmyfreeze Drives: g5 Camaro Join Date: Oct 2023 Location: 54880 Posts: 7	Corsa cat back/long tube header neck down Been lurking around for a long time, first post. Wondering if anyone has a better idea on how to go from stock manifold/converters with corsa 3" cat back to longtubes, corsa back...WITHOUT necking it down? My long tubes are stainless works which have "factory connect" and "performance connect" versions. Before ordering headers, I called sw tech support and they recommended the Performance connect since I already had Corsa cat back and I did NOT want a neck down going from 3" to 2.5" then back to 3" cause that would drive me nuts knowing even if it doesn't change performance. He did tell me there would be some fabrication no matter what. See photos. The straight pipe from the headers to the corsa elbow is 3" x 18" separate piece I bought to make it work. Car is offroad only if anyone is wondering why I didn't install the high flow cats included with the sw kit. Attached Images

03-11-2024, 10:31 AM	#3
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,079 View My Garage	Vibrant Performance sells 3in pipe and 3in connections. __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

03-11-2024, 11:58 PM	#5
jimmyfreeze Drives: g5 Camaro Join Date: Oct 2023 Location: 54880 Posts: 7	Done. Brazed in wide band bungs with Braze 560 silver rod. Attached Images

03-13-2024, 01:40 AM	#6
jimmyfreeze Drives: g5 Camaro Join Date: Oct 2023 Location: 54880 Posts: 7	Moving on to gearing changes, decided on a Yukon 4.11 setup with truetrac. Almost went with the JRE but the price is $4461 to ship a rebuilt diff complete which is ridiculous so I'm doing my own upgrade. Bought a 3.27 diff that no one wanted on ebay for cheap, tore it apart today...all good. Waiting on parts now, but total cost with ebay diff, yukon 4.11 gear kit, yukon master rebuid kit, and truetrac is $2646 total. Prob go with the hendrix bushings so add $175, maybe cover. Nice to be able to take my time with the spare diff and sell my stock 3.45 after the swap out. Attached Images

03-11-2024, 07:56 AM	#2
MSgt O Drives: 2012 Camaro 2SS/RS Vert LS3/M6 Join Date: Aug 2021 Location: Cheboygan, Michigan Posts: 660	Just weld in 3" pipe...I guess Im not following the issue here?