These DP are M2, HKS, Petti, and the other DP that RX7 store sell. Which one of these are the best bank for my buck?

Thanks

J.J. Lee

 

M2

 

vrsexhaust.com, stainless steel mandrel bent for $200. I used to have one and it fit perfect, no sense wasting $100+ on something else that is just a pipe like this. You do have to remove the studs though, M2 you don't.

 

Definatly stay away form hks since you are up north.

 

M2 (if not in stock, Petit)

 

SS 3" is the best.

 

Racing Mazda straight through mandrel bent 3" DP/MP for $240.

 

The M2 may not be the best. Here's my opinion after buying one. Maybe I'm missing something, but here's the way it worked out for me.

Does not match shape to exhaust manifold on turbos. I matched the shape with some grinding on the DP.

No bracket to bolt to trans. I made one.

Cocked back flange that bolts to main cat caused exhaust leak. I had to use two new gaskets modified to wedge shape.

After doing all this stuff I'm quite pleased with the product. After fixing and installing the product it added about 25 rwhp according to my gtech meter.