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gonzo4886 · 10-08-2009, 02:15 PM

What year LT1 do you have? If you have a non-vented opti you don't have to do a full conversion. All you have to do is make your own vent. Here's a write on how to do this. http://www.corvettefever.com/howto/16758/index.html
I've used a MSD opti before and I thought it was a quality piece. You can tell a huge difference compared to the stocker. Summit also sells their own brand of opti. I've never seen one but everthing I've ordered that was summit brand has been pretty decent quality. GM opti is crap

10-08-2009, 02:15 PM	#25
gonzo4886 Join Date: Aug 2007 Location: Chicago Posts: 26 iTrader: (0)	What year LT1 do you have? If you have a non-vented opti you don't have to do a full conversion. All you have to do is make your own vent. Here's a write on how to do this. http://www.corvettefever.com/howto/16758/index.html I've used a MSD opti before and I thought it was a quality piece. You can tell a huge difference compared to the stocker. Summit also sells their own brand of opti. I've never seen one but everthing I've ordered that was summit brand has been pretty decent quality. GM opti is crap __________________ F-Bodyless Last edited by gonzo4886; 10-08-2009 at 02:16 PM.