extrude honing? anyone w/ results on an n/a?
 

as the subject states.......

do any of you out there have some real #'s re: extude honing your intake manifold and/or engine block exhaust and intake ports on an n/a, specifically an 89-91 model?

hp increase?
torque incr.?
mpg incr.?

rotarypwrd

been thinking about it, but have a hard time justifiying the dropped about $500 out of my pocket to do a intake mainfold.

They claim 15-20 HP though (depending on other options).

I know $500bones is a lot to shell out and companies can claim all they want re: hp #'s.

that's my reason for this post. I'm trying to find out from anyone........a nonbiased proof of:

- dyno #'s
- real experience

on improvements on an n/a ( not turbo applications) using this process???