Originally Posted by SlingShot
Yes, use the L99 for the auto and LS3 for the manual. I ordered and installed the ones for the L99, and there are ZERO issues with them. They made a world of difference in sound and power. Between the Solo cats and Roto-Fab, at 1/2 throttle my tires are just spinning. Next mod will be new rubber ...
This is great to know. I was planning to install Solo high flow cats on my 2SS but fell into a good deal on a ZL1 so I traded her in. I thought I was limited to the OEM cats on the ZL1 unless I went the route of LT headers and tune.