Spannerhead. Honestly you need to have the bumper professionally painted especially given your first sentence in your post. $800 is a little high, I would think more like $600. The flex additives the shop has to add to the paint to adhere to the urethane of the bumper probably accounts for some of the cost. BMW Drilled & Slotted Brake Rotors for BMW 3 Series F30 (2012+) Cross-drilled rotors are a quick and simple way to improve initial pad bite. With the additional leading edges at each hole, the pad is able to grab the rotor just a little bit harder when itaEURtms time to stop NOW! Tests have shown (and drivers can feel) the immediate improvement. Performance shock absorbers can greatly improve the handling of your E46. You can also replace all four coil springs on your E46 with performance springs, giving it a slightly lower stance and stiffer handling. Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement.
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Another way to tell is the packaging. Brembo packages the rotors in pairs and the part# will be on the box. The Brembo Drilled or slotted rotors will have a part # like FD00037 or FS 00037. FD is for front drilled. FS is for front slotted. I hope this helps. (again, this information came from an e-mail directly from Brembo North America)

Here's the real answers to what seem to be the FAQ's. The facts are taken direct from the TIS, the deductions come from my engineering background. As always, please do not hesitate to identify and correct any errors I may have made. Rotor sizes (in mm)323 - 286x22 front, 276x19 rear 325/328 -

The M Performance brakes look a bit different and appear larger and fill the wheel more than the M Sport brakes. Red calipers with the cooling and high performance tire package with 19" wheels. Blue calipers standard on the M340i with 19" wheels. Note the placement of the pin to keep the pads in place. Attached Images.
fwiw, the 330 front brakes will probably be 'enough' to stop the car just fine-the 330 rear brakes are needed if you're using the 'traction control feature' that the E46 got instead of a real limited slip diff. The 3L engine eats the larger rear pads at the track- I can't imagine the smaller pads and rotor would last long. Filter - 9 Nm (78 in-lbs) Automatic flex disc/flywheel to crankshaft - 121Nm (88 ft-lbs) Torque convertor to flex plate - M10 8.8 45Nm (33 ft-lbs) Differential. When reinstalling, insert all 3 bolts finger tight. Tighten the 2 front bolts first, then tighten down the rear bolt. Ordered new rotors and pads for the front as nearly on the sensor and rotors are well gouged. Went to put them on a little while ago and found the new rotor was too small. They are OEM Takstar (SP?) disks. My rotors measure 300mm. The new ones are about 20mm smaller. (I didn't bother measuring them accurately as it was quite obious from the pad
Insulated E9X 325i/328i/330i Front BimmerWorld V3 Stainless Steel Brake Line Axle Set. Premium Teflon & Stainless DOT-approved brake line set with heat-blocking insulation for the front axle. Price: $79.99. View Product.
These rotors arent' meant to be resurfaced, they will warp in no time even if they are within spec. Find an Indy Shop, the dealership is charging full retail for the parts and high labor rates. Had my brakes done again recently, 4 factory rotors, pads, and both sensors for $650 out the door. My dealership quoted me $1200 for the same job. Brake rotor diameter? The E90 brochure indicates that the 330i front rotors (disks) are 13.0" and the rears are 13.2#. Likewise it says that the 325i front and rear rotors are 11.8". Typically front rotors are larger than rear rotors since they typically perform some 70 to 75% of the work. MSRP Price: 9095.00. BW Part #: 1M1.8020GTR. Brand: Brembo. Description. Customer Reviews. This Brembo GT-R front BBK (Big Brake Kit) features a pair of Brembo 6-piston cast 2-piece radial mount brake calipers with nickel plated finish, Brembo High Performance FM1000 brake pads, a pair of 355x32mm 2-piece brake discs, CNC machined caliper .