Must be my turn to have a say. I have had my exhaust set up on the L24 and L28 engines in my car. They sounded very similar, except the L28 was a bit deeper and idled rather rough (cam). It was a good volume up to about 3500rpm, not too quiet, not too loud, which is good when you are on the highway for an hour or two. Cruising around gave a good burble and drew good attention, but when the twin SU's were opened, the thing got very loud very quick. Rotary drivers became jealous and everyone used to comment on how good it sounded. Not a bit like those buzzy ricer burner jobs. Pushed 110 - 120dB though. Luckily the stereo pushed 130dB. It was a very practical system. Second hand Extractors from the trading post finishing in a 2.5 inch collector. 2.5 inch pipe right through into a 2.5 inch cheapie sports muffler with a 2.5 inch tip. All fitted up at Sebrings on the Gold Coast. I am very happy with it, it was fairly cheap, and it lets the engine rev. Scott