basically, im thinking aboutadding it tomy 02 4.8. I already have a ravin 55 muffler, and i heard they are a compromise between stock and cutting off the cats. just wondering if anybody knew about mileage, power, sound, etc on those...

 

I'm sorry, but I'm not fully understanding your question. Can you be a little more specific?

 

i just want to know what they sound like, as far as sound level and tone, and if they help performance at all

 

hi flow cats will affect both sound and performance. better flow (more power)and louder sound. I don't have them on now but I had them on my mustang and it did make a difference. I suggest you do headers while you are at it.

 

I AGREE WITH POPO. HI-FLOW CATS ARE GOOD BUT IF YOU HAVENT DONE YOUR HEADERS YOU SHOULD. HEADERS WITH A GOOD EXHUST AND COLD-AIR INTAKE WILL REALLY IMPROVE PERFORMANCE. AS FAR AS A GOOD SET OF HIGH-FLOW CATS, YOU CANT GO WRONG WITH MAGNAFLOW. FOR HEADERS I BELEIVE EDELBROCK MAKES THE BEST FOR THE MONEY. I RUN THEM AND HAVE NEVER HAD A PROBLEM. IF YOU GO WITH A CHEAPER HEADER, LIKE PACESETTER, MAKE SURE YOU TOSS THEIR GASKETS AND BUY A GOOD SET LIKE FEL-PRO. HOPE THIS HELPED.

 

I don't think TN has emissions checks... I'd just get the Hooker longtubes with the y-pipe that bolts up to your factory exhaust and has bungs for your 02 sensors. Under $500.