[Wyatt]

I'm looking for recommendations on the length for the flex pipe I'll be installing on my XR4TI. I'm having the exhaust done in the next few weeks and have already secured a Catco high flow cat and Borla XR1 muffler, so now I'm just rounding up bits like the flex pipe and a couple flanges.

So, how long should the flex pipe be to be functional?

[Ken Farr]

My flex-pipe is 6" and provides more than enough flex. Something to keep in mind, these cars didn't come with flex-pipes and a friend of mine who works at a muffler shop gave me hell for installing one.

His theory was well understood, the exhaust system should be designed to twist with the motor, thus a flex pipe isn't required. BTW, a FWD application is different since the motor twists a different direction.

That also being said, I installed one because it made routing the exhaust a little easier, it is a weak link and we'll see how long it lasts.

[Nikuk]

6" is plenty.

I like em for sake of saving the tubular manifold. And, IMO, it makes turbo R&R easier.

[turbo_dad]

You friend is right the exhust should move with the motor.

[Wyatt]

I think it's swell that a well designed exhaust should move with the motor, but anything I figure anything I can do to alleviate some of the weight and distress on the turbo and exhaust manifold is a good thing.

[Sleeper_Inc]

I have a 4" flex pipe now, and it seems to flex more than enough for me, and I have bad motor mounts

[Top Notch]

Around 4 or 6 to go any more will hit things ask how i know. I have a 8 or 10.