Lee Willis
Posts: 1953
Joined: 7/27/2005
Status: offline
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I don't know which Corsa you are looking at. Several manufacturers make straight pipes with no mufflers. If you run cats (I would and do -- it's the law), these exhausts are loud but not at all like open pipes - cats act something like mufflers and so the sound is tolerable (well, your neighbors might not agree, but no doubt you would).
Corsa and others also make something that looks very much like a straight pipe system (i.e., it has no mufflers at all just pipes), that has ripple chambers inside the pipes -- a chambered exhaust. This is nearly as loud although the sound is generally much better (see below).
One thing to keep in mind is that the completely unmuffled sound of a modern V8 is not particularly attractive. It has a good deal of high, barking and quite crackly sound to it, not anywhere near the low, deep muscle-car rumble most people are seeking (in the 70s those sounds came from a combination of seven+ liters of displacement, big valves with relatively shallow openings, low RPMs (only about 3/4's of today's RPMs) wide header pipes, and long chambered exhausts.
An optionyou might think of is to install QTP electric cutouts on your car. These are electric coutouts operated with a switch inside the car -- you can open them fully or just a bit. Installed well either ahead of the cats (or just behind, or instead of), and keeping your present cat back they give you the option of quiet when you want that (on long trip, starting up early in the morning while the neighbors are still asleep), but you can open them partially of fully for asmuch sound as you want. Cost to have them done right (welded in by a good shop) probably costs about as much as a new, full catback. The fit is tighty and they must be welded in just so, and the wires insulated against heat and routing just right, for it all to work well - but its worth it. You can go from very quiet to very very loud, or back, in four seconds, anytime you want.
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2007 Aston Martin Vantage Prodrive
Lincoln MKZ "Grandfather car"
''98 Z28 with iron LS 408, NOS, tricks, street driven mid 9s (sold to my youngest son for $1, Aug 28, ''07)
''02 SCd 427 cid ZO6, 704 RWHP, sold Aug. 28, ''07
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Printable Version
or a little moremuffler delete on a z06 - 
