mugen exhaust

itr · Post by **itr** » October 29th, 2002, 1:12 am

you know how the mugen exhaust necks out from the cat to the resonator at 2in , and then at the end of the resonator its a little bigger through out the whole system. can i cut the part before the resonator off and weld bigger piping on it or does the resonator start at 2in and gets bigger at the end of it???

Aj · Post by Aj » October 29th, 2002, 3:57 am

Call King Motor sports, they are likely going to be the only people that will know the internal piping diameters half way down the B-pipe. not sure if they'll even waste the time finding out if they don't......

Post by **Trey** » October 29th, 2002, 7:49 am

it is 2" inside the muffler from the loop.

Not sure about the B-pipe

Cosworth · Post by **Cosworth** » November 6th, 2002, 7:23 pm

Every JDM cat-back exhaust system (except 1 or 2 straight through and under-the-axle design) will have small bottlenecks in the b-pipe. Why? Maybe it's to produce a desirable flow characteristic which can't be achieved by having a straight pipe design. Possibly, bottleneck is good for throttle response and/or midrange gains.

All in all, I wouldn't chop up Mugen exhaust to eliminate the bottle-neck. Mugen knows what they are doing... it's not there for aesthetic reasons.

Post by **Trey** » November 7th, 2002, 9:21 am

I wouldn't chop it up either but I don't think I would put it first on my list.
Or even 2nd. For the cost I can buy a lot more parts and I don't think the ITR exhaust is a huge weak point.

TypeR882 · Post by **TypeR882** » December 3rd, 2002, 3:32 pm

does your mugen exhaust make a vibration sound when driving?

Austin · Post by **Austin** » December 5th, 2002, 6:27 pm

Cosworth wrote:Every JDM cat-back exhaust system (except 1 or 2 straight through and under-the-axle design) will have small bottlenecks in the b-pipe. Why? Maybe it's to produce a desirable flow characteristic which can't be achieved by having a straight pipe design. Possibly, bottleneck is good for throttle response and/or midrange gains.

All in all, I wouldn't chop up Mugen exhaust to eliminate the bottle-neck. Mugen knows what they are doing... it's not there for aesthetic reasons.

Bottleneck in the b-pipe after the cat is to slow down the flow just after the cat to maintain the temperature of the car...