For those of you with the NA FC, the GREX strut tower bar may pose a threat to your cooling system, I know it sounds funny...but this is why. The GREX bar was never intended for use on an NA Rx7, as it was designed in Japan where there are no NA rx7s! What happens is, after installing the bar, you'll think that it fits perfectly, everything will look fine. BUT start your car up, and have somebody hit the gas, you'll notice that when the motor torques, the radiator cap closest to the motor will nudge the bar, if you keep doing this, it will eventually loosen the cap and cause the coolant to spew everywhere! So this is just a fair warning, if you get this bar, have about 1/8th of an inch shaved near the radiator cap...and of course, this warning does not apply to Turbo2s or the newer FCs that only have one radiator cap....