My 91 came with an L03 and has the stock exhaust. I've dropped in an L05, because I liked that idea better than trying to rebuild the L03 into something better. Based on what I've heard, the stock exhaust wasn't all that good and was upgraded for 92. Anybody got ideas on what sort of exhaust is best for these cars? I'd rather not make the frame changes necessary for dual exhaust (even though I love the exhaust system on my 94!). Thanks!