Exhaust Bellows

[Nhollis]

I'm New here.Thanks for letting me join. I've been reading a lot on posts here.And have already found a lot of good information. I was an owner operator for many years. I've only had 1 ISX engine in a 03 W900L. I've recently purchased a 09 Pete 389 with a 485 Cm871 non deleted Cummins in it. My question is about the exhaust bellows. My truck currently has flex pipe in place of the bellows. Will this interfere with the regin process.If so do I need to go back with the original bellows. Thanks Nick

[Rawze]

(04-19-2025 )Nhollis Wrote:  I'm New here.Thanks for letting me join. I've been reading a lot on posts here.And have already found a lot of good information. I was an owner operator for many years. I've only had 1 ISX engine in a 03 W900L. I've recently purchased a 09 Pete 389 with a 485 Cm871 non deleted Cummins in it. My question is about the exhaust bellows. My truck currently has flex pipe in place of the bellows. Will this interfere with the regin process.If so do I need to go back with the original bellows. Thanks Nick

as long as there is no exhaust leaks, it should not matter.

[JimT]

Last year I replaced the exhaust bellows on my 2012 Pete 587 with a Torque brand one from Amazon at half the cost of the dealer. Matched up with OEM part #. Only downside was the clamps they provided weren't as good so I just reused the old clamps. A good coating of anti-seize along the entire inner side of the v-clamp helps to seat the clamp and reduce/prevent it from rusting to the pipe. So far it's performing identically to OEM. Considering it's usage I figured it wouldn't hurt to try out. I've been getting around 200k miles out of the OEM bellows before they start to leak, so this one still has a way to go to truly prove itself.