I just bought a Taipan XP Turbo back exhaust from Vishnu for my 05 MR. I bought it used, only about 2000 miles on it; from my brother in law (Sano) who had it on his 03 Evo. It has been on now for about three days. I have only drove it twice now with the new exhaust on. It has got me a little nervous. Right around the time the turbo begins to spool at 3000 rpm it makes a rattling noise. Not every time but often enough. Is this to be expected or do I need to hurry up and put the stock back on?

Thanks for the help!

 

Have you double checked all the bolts to ensure nothing's loose?

Also how's the front lower tie bar clearance? A little rattle isn't much to worry about; I'd be worried if it were a lot of rattle though.

 

I think its your downpipe rattling against your oil pan. This is common problem with 3'' exhausts, theres ways to avoid it just by fiddling with it.