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-   -   Exhaust Manifolds 160 v 143 (https://16vminiclub.com/showthread.php?t=37890)

will16 02-02-2018 02:01 PM

Exhaust Manifolds 160 v 143
Hi guys,

I'm redoing the exhaust on my mini, I have my 143 manifold/downpipe which I've been using since the conversion. I also got a 160 manifold/downpipe. I was told the 160 is better flowing, but the issue I'm having is that the 160 one is much bigger physically.

What I'm asking is will the 160 really make a big difference over the 143?

Rest of the exhaust will be 2" diameter with a 3" tip (yob :p)

143 set up

160 setup

AGoaty 02-02-2018 02:32 PM

Two things. First is that it is physically bigger but only width ways so wouldn't think that will matter to you.

Second is the 4 bolt 143 had a huge amount of weld on the inside of the twin holes. I opened these up a vast amount when I built Phoenix. This alone must make it flow better.

I have both here if you would like me to actually measure the distance from the block.

gazwad 02-02-2018 04:06 PM

once the welds have been opened up on the 143 manifold the real world difference will be very little. I have tried a few different manifolds - 143 then a 160 (didn't notice any real difference), then a 340r large bore stainless which gave good top end but lost torque in the low to mid range, and I now have a modified janspeed mild steel manifold which seems to give the best all round performance.

will16 02-02-2018 08:43 PM

Thanks guys, that confirms what I was thinking! The 160 sticks out the front alot further than my 143 one so think I'll just get the die grinder out

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