350Z_NOW

One of my Helix test pipes 2.25" non-resonated (driver side) with CEL fix keeps cracking. First crack it was by the OEM catalytic bracket, so I removed the bracket figured that was causing tension + pressure point. I got the test pipe rewelded installed it back. 2-3 weeks later it cracked again, same spot and where the pipe bends (upper) this time. So again re welded.... (with additional sheet of metal 1" strip welded around the pipe) for reinforcement.... Tonight I started to hear the air leak again....so the usual cracking once again.

The passenger side is at its 100%

People' s Suggestions:

- Put more gaskets layer to extend length (pipe might be a bit short)
- Reweld with 1/8" to 1/4" extended pipe (or which ever measurement works)
- Buy a different brand of test pipes

I feel power lost ...... really tired of crack issues.....

urbanchaos

iTrader: (24)

Get some kind of flex joint welded in.

ekidd

iTrader: (25)

I dont think if your supposed to reweld over a weld. Someone correct me if im wrong. Anyways, i had the same problem with my kinetix TP's. I got tired of it so i just slapped my stock cats back on.

350Z_NOW

I haven't heard that strategy, can you show me a sample? Is that similar with Y pipe with flex pipe?

davidv

iTrader: (2)

Photos appreciated.

How many miles are on the test pipes?

terrasmak

iTrader: (8)

+1 or just buy the Megan ones with flex joints. There the only ones people arn't having problems with.

350Z_NOW

The Helix right?

terrasmak

iTrader: (8)

My bad , and fixed my post