Junior Charter Member
Good point! I already do a pretty good job of keeping my street clean as it is.Avalanche325: I had planned to modify my sidepipes by turning the "turnout" approximately 30* down, but one of the local Cobra owners warned that doing so will result in the exhaust pulses kicking up a lot of road dust. So I decided against the turn down.
I am doing 30" as I need all of the quiet I can get with my somewhat radical cam. I have been to meetings with 30 Cobras and mine was easily the loudest. 24" would probably be fine if yours isn't that loud to start with. If I wasn't soooo loud, I would think about 24" also for the look. The other advantage of the 30" is that more of the pipe will be cooler. I think it will be one of those things that I won't notice after a week, just like the mufflers being larger diameter. I will hopefully notice that my ears don't ring even with earplugs.
If you look at pictures of originals, the FFR pipes are a little short. Most of the shots that I found, they go back to where the hip meets that body behind the door. Which for my eye, it the ideal place aesthetically. Measuring, that adds about 3 inches to the overall length. That will be easy with the 24", and not too bad with 30". There is just not a whole lot of 3 1/2" pipe at either end.
Here is my plan. Let me know if you see any issues.
Leave 1" of the straight pipe after the collector. I like the look and I can put my O2 bung in there. The turnout will be 7 3/4" long. This is just a little past where it completely straightens out. This will put the very back of the outlet right at the join line of hip and body. I am going to keep the junctions straight in both planes. I am leveled fine with the FFR pipes which are straight horizontally, so don't need to fudge any angles. I am going to keep the 90* angle for the turnouts.
How much pipe should I leave to go into the muffler? I am thinking not much at all like 1/4"?
Looks interesting! Haven't looked into the details too much, but will your heat shields fit?I purchased a set of 24" mufflers from Classic Chambered Exhaust for my car. They have a website and are easy to deal with. They build quality products and will assist you along the way. 248-889-4364. Mike