Aftermarket Y-pipe

[blackhawk17]

Has anyone installed either of these on their TBI 350 4wd?

Magnaflow 23256 Y-pipe Cat assembly
https://www.amazon.com/dp/B000JKLEGA/ref=psdc_15713841_t1_B00ABK67BK

Flowmaster 2010021 Y-pipe Cat assembly
https://www.amazon.com/dp/B00ABK67B...olid=1H30KN7E7PWEH&coliid=IEGQWSD8C9WQ4&psc=1

I'm currently running straight pipes with the stock y-pipe, but would like to add back a cat with an improved y-pipe design. I've read the reviews on both, and it seems like it's 50/50 on fitment. I have the stock manifolds.

 

[df2x4]

I'm using a very similar Magnaflow on my red truck, part number 23457. The red truck is a 2WD Vortec 4.3L, so I'm sure it's quite different from your setup. I like it a lot, though. Much better bends than the factory piece. Can't tell you much about fitment as I had my mechanic install mine, but he usually tells me if there's any difficulties and he never said a word. I'd recommend the Magnaflow without hesitation.