I have it on my car, its slightly louder than standard but the engine breathes much better and runs smoother, the engine also runs cooler, no more glowing of the headers. Fuel consumption is also improved plus a bit more power.
+1
If you have a later car with the big, linked exhaust support brackets that have the heat shields bolted to them, then the original heat shield can be bolted straight back on over the Stage One pipes. If you have the earlier separate brackets with the shields mounted directly on to the pipes then you'll need to either; get the new big support brackets and fit them or weld on threaded bosses to the silencers or do as I did and just do without the heat shields; the Stage One silencers run much cooler than the standard ones over most of their length and particularly where your hand rests on them for a warm up! Don't touch the ends of the silencers though, they do get a bit toasty warm.
