teknikscian

iTrader: (3)

I add just the Rails, and it made a HUGE difference. I had already had an upgraded suspension, front tower brace and a roll bar and even then i noticed a huge difference. even had to remove my rear sway bar because it was so stiff afterwards..

AbeFM

iTrader: (3)

I went to a much looser rear sway as well, though I imagine more of that is from the rollbar.

As far as the butterfly part, Mazda put it in it's new cars. It's for those "45*" situations. On turn in, the outer front tire will want to get closer to the inner rear - a brace to help with that natural flexing has to help.

Efini~FC3S

iTrader: (4)

Anyone know what gauge the fm rails are?

mr_mazda329

I'm pretty sure its either 16 or 14 gauge aluminum

RusMan

Stainless steel, about 1/8" thick.

bryantaylor

iTrader: (5)

they dont look like they would be that hard to make, hmmmm

grippgoat

iTrader: (1)

The butterfly looks barely welded at all from the pictures on FM's site. I wonder what some quality time with a MIG would do for them.

-Mike

SamS

iTrader: (2)

Maybe my "butt chassis flex dyno" isn't very sensitive, but I couldn't tell any difference after installing the rails on my ~120k miles chassis.

spike

No point in welding it anymore,the butterfly is stitch welded together.

AbeFM

iTrader: (3)

high res version at http://abefm.smugmug.com/photos/55977906-O.jpg


high res version at http://abefm.smugmug.com/photos/55978324-O.jpg