John - A friend of mine made the entire exhaust system a while back. I originally had just a 3.5" perforated pipe inside a 5" outer pipe with that really fine glass packing that the new trucks are using in their exhaust systems. This was supposed to be the good gear, but I melted the packing the first time I took the car to a racetrack. End result was the sound of open pipes and 130+ decibels at around 2500rpm !!!
I kept the 5" outer pipe and 3.5" perf pipe, but had a 2" pipe fitted inside with a spiral welded around it, kinda like a traditional "Lobak" muffler, but with stainless packing outside the 3.5" pipe as well. Sounds confusing, and it's definitely restricted the exhaust flow. It has made the exhaust nice and quiet while I'm idling around. It still makes a nice sound when you get on it though
PCC - the mention of Bunnings plumbing reminds me of Reptyl's PVC intake invention. I'm glad he went with metal in the end !!!
Robo - the body on this car was on my last Cobra. If you want to see a serious battle scar when the car was in it's previous guise, have a dig through my gallery ....
Les - I wouldn't have owned up to my off-track excursion if it wasn't for your taunting about posting something on here about it !!!