right now have an ecu flash and mbc (went from WHP218 stock hp to WHP253 with tune and mbc). going to be adding a 3 inch turboback with a re-tune using ecu flash. what kind of wheel hp and wheel torque gains would you guys expect with the addition of the 3 inch turbo back..probably going to use stock cat converter for now.. its an 08 evo 8 running 93 gas

 

218 seems really low for stock.

 

its a dynomite dyno..reads low

 

08 Evo 8 + MBC = 3000 whp

 

damn 3000whp?

 

if thats 3000 lol everyone adding more mods is really greedy lol

 

20-25 whp 30-35 w/o the cat

 

It's not a TBE if you use the stock cat. That means you're just adding a downpipe and cat-back. The downpipe adds no power when still using the stock cat, so your gains will be equivalent to the addition of a cat-back, which is about 12-15whp. You could gain the same amount by leaving the stock cat-back and stock downpipe while installing a test pipe for $90.