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XfireZ51 · 05-08-2010

Took a trip to Brakes Plus yesterday to "address" the constriction issue, thanks to Al. Seems like when there's some work to be done on a ZR-1 in Chicago, some of the luminaries show up. Low and behold, Pete comes over to mount some Nitto's on Kevin's car for BG. Paul Workman showed up also. Helpful that they were there to lend a hand. Completely impromptu on an FBI Friday afternoon. Besides the narrowed header pipe, we also tacked the muffs. They'd rotate when the motor torqued over giving them a cockeyed look.
The piece we eliminated comes from Magnaflow. The system is meant for a stock exhaust LT-1/LT-4 motor so it makes sense but not for the LT-5 with headers. Here's what it looked like:

The OD of the pipe was 3", while the ID was 2.75". However, there it slipped over onto a 2.25" inner pipe that was attached to the female ball flange. We replaced all of that with a 3" female ball flange which slip fit into the swedged portion of the original 3" portion of exhaust pipe. Al then welded it.

05-08-2010	#9
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Constricted Header Collector? Took a trip to Brakes Plus yesterday to "address" the constriction issue, thanks to Al. Seems like when there's some work to be done on a ZR-1 in Chicago, some of the luminaries show up. Low and behold, Pete comes over to mount some Nitto's on Kevin's car for BG. Paul Workman showed up also. Helpful that they were there to lend a hand. Completely impromptu on an FBI Friday afternoon. Besides the narrowed header pipe, we also tacked the muffs. They'd rotate when the motor torqued over giving them a cockeyed look. The piece we eliminated comes from Magnaflow. The system is meant for a stock exhaust LT-1/LT-4 motor so it makes sense but not for the LT-5 with headers. Here's what it looked like: The OD of the pipe was 3", while the ID was 2.75". However, there it slipped over onto a 2.25" inner pipe that was attached to the female ball flange. We replaced all of that with a 3" female ball flange which slip fit into the swedged portion of the original 3" portion of exhaust pipe. Al then welded it.