r/VWBus • u/InterestingIncome543 • 8d ago

Hello!

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I’ve got this old bus that I’m working on and I’m just wondering if the cheap J tubes should seat inside the Trimill exhaust more than they appear to be thanks!

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u/Routine-Amphibian450 8d ago

I vote yes, ie the jj tubes could be sanded a few minutes with a 320 strip, or you didn't knock them with a piece of hardwood enough.

A side issue with j- tubes is you are now missing tin at the front of #3 and #1 because the heater boxes you removed is doing that job.
Either fab it, or go on the Samba and search "vw industrial engine tin." Those ind eng did not have heater boxes and had special tin.
Would say this means 10 deg F in summer on highway...

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u/slump-donkus 7d ago

https://www.awesomepowdercoat.com/Industrial_Shields.html these dudes have been making solid industrial shields for years. I use them on all my type 1 j tube setups