is a 13b 4 port the same size as a 12a because i saw one on mazdaracing for sale that says it will just drop into any first gen. but i thought 13b work 10 or 20 mill longer and u had to modify yours or buy a crossmember from racingbeat.

 

Go to the stickies at top or the archives...all awaits you there....and wait for the PC to tell you you've posted....don't keep hitting "submit", for Pete's sake...