if i deleted the cat myself could i just stick a 4" piece of flexpipe in there in its place?(with 2 - 4 inch stepclamps)or would that flexpipe rattle to **** under there?

Because where i live a 4 inch turbo back kit is $900. and a 4 inch pipe to fit where cat is is $100

Now if i could just replace cat with 4 inch flexpipe and remove muffler with a str8 through one couldnt i save lotsa money? Why r the kits so much are they shaped with different bends than stock?

 

or you could just get yourself a scrap piece of striaght 4" and go from there for a CAT delete.

 

I used 4" flex pipe that I got from the truck stop, it does't move at all.

 

Doh... you mention it in your signature too. Oh well.

 

ok kool. i have ample access to 4 and 5 inch flexpipe because i work at a heavy duty truck repair shop.maybe ill take a str8 piece of old 4 inch exhaust and get the butt ends flanged out or stretched a lil more so it can slide over the pipe ends.

 

thats basicaly what I did for my cat delete. you'll just need two new clamps.

 

whats the difference between the 4040 aero and the 4040xl aero?ones a muffler and ones a resonator. the resonator is $190 and the muffler is 4150. Does the resonator give more power than the muffler?