Formula Drift legal. We 3D scanned several E46 Chassis, to CAD design a brace that accounts for variations in older cars. Accurate laser cut plates and notched tubes are robot welded & powder coated. ~ Tie in your rear strut towers and subframe mounts for increased chassis rigidity ~ Help prevent damage to the strut towers and subframe mounts ~ Perfect pairing for our true coilovers, we’ve made the ultimate rear brace bar that was ~ After drilling the floor panel as shown in the site gallery, and bolting the feet down with included m12p1.5 30L bolts & m12/m14 flatwashers, the bar clamps the floor panel agaist the same structure inside the chassis that the rear subframe mounts are attached to. Entire installation can be done from the top without subframe removal. ~ Our solid subframe bushings have long hardware included that allows the brace and the solid bushing to be optionally mounted on the same long fastener. in your rear strut towers and subframe mounts for increased chassis rigidity. Check the unibody prep photos shown in the gallery, The 60mm DIA bottom feet will need at least a 2.5" hole saw to pass through the trunk floor. The M12 hardware is accessed just through the second trunk layer, at the T shape intersection, and you'll need a 14mm or larger drill bit there in order to preserve the m12 threads just below the metal. This is the same m12 thread & internal chassis box structure that your subframe is bolted to under the car, and we are accessing the top side of that. Bolt the feet down with included m12p1.5 25mm length bolts & flatwashers, the bar clamps to the 2nd floor panel. ***SEDAN MOUNTING NOTE** ~ Although the bar was designed on a coupe, the sedan just requires a spacer under the feet shown in gold in the gallery photos. The sedan option is added in cart. Coincidentally if you use our solid subframe bushings in the raised position, that frees up the 8.75mm top spacer which is perfect for the job of fitting the strut tower bar to the sedan with exception of its larger OD than the proper spacer option in cart. Installation can be done entirely from the top without subframe removal. Fits 1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3