It has mufflers, you pick the muffler up, look in one end, and right out the other, there is like a baffle in there or some ****, but the exaust passes cleeeeeeeean through, not thru the baffle.

oh ok i got it... so in other word really loud... thanx. seriusly though im sure an na int that loud with the cats still on... at idle anyway.. wot is probly loud as all hell... but thats how it should be

The mufflers do alot of the quieting down... when my Y pipe flange broke off I wanted to cry it was so loud, but this was with RB header + presilencer only... no cat, but the volume difference was huge without the stock mufflers... after that added RB Y pipe and mufflers, then it sounded very sexy at idle and wot.

When my exaust was getting done, I went there and heard the car before the mufflers got welded on. The next day when I picked the car up, it sounded the same, so basically the Borla mufflers didnt muffle anything

I believe that the RB mufflers are straght through, but I never bothered to check. XR-1's are ALOT louder than other Borla mufflers.

yeah the borla catback doesnt use the xr1 mufflers... i think it uses something else... either way i dont think welding is necesary with it... as its bolt on

get a flowmaster, it'll get u laid