Now say I install the JDM 4-1 with carsound cat. Is this setup the same length as the USDM Headers + USDM cat? Or is the JDM +CS Cat setup shorter/longer than where the us cat bolts on in its way back ? Thanks

 

same exact length.... no mods neccesary...

 

 

the b-pipes are the different lengths on jdm versus usdm

 

The cats come s a universal part, they are then modified with the proper flanges and length to fit a variety of applications. So, as long as the application and which header is used you shouldn't have a bolt up problem. You will have the mismatch/bottleneck at the B pipe though.

 

If you specified a JDM header and USDM exhaust when you ordered, then it should work out fine.

 

Exactly, YOu can also specify a JDM header and JDM exahust and the cat would be fabricated to make this work.

 

"You will have the mismatch/bottleneck at the B pipe though"

Does this cause any leaks or problems with the connection?? Or is it more of a performance disadvantage.

 

yup. should mate up fine, though.

 

Talk to SMSP for an adapter that you can easily have welded in to remove the bottleneck. I did, works great!


[Modified by FBP_1171, 8:48 AM 9/13/2001]