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I dug through my iron pile to find the old crossover, cat and manifolds I had removed to install the Downey headers. I cut the flanges off of the crossover. The crossover tube measures 1.5" diameter. Looks like there would need to be a blank off plate for one of the outlets on the driver side manifold.

Thinking I will get some two inch mandrel bends and weld up a Y pipe using factory crossover flanges and the old cat flange. I will test install it on the 2wd auto.

DUDE, i;ve been looking for someone FOREVER that has done this.
Can you measure the downpipe flange on the driver side manifold for me? I need to get one cut out of stainless... and i've been searching for some dimensions for weeks... it would be GREATLY appreciated... i need to get it done because i have an e-test in a month....


There are a couple people on YT that have done it with good results. One goes under the username M3 I believe. I have some pics that he sent me. His worked out well.

I'm gonna use 2" mandrel bent pipe to a 2.25 collector. A smaller diameter might be a good idea though I'll have to think it over.

(aka suprathepeg, aka Sean)
89 v6 SWB truck "BLACK BEAUTY" EB valves, P&P head 30 over.
95 FZJ80. Lifted. locked and rollin on 33s (my dream machine)