380mm Brembo Big Brake Kit
These adapter plate kits allow you to run the huge 380mm M2/M3/M4 front rotors on your Non-M BMW using any F-Series 4 Piston Brembo Caliper. This kit works for all E and F Series Non-M vehicles such as E82,E90, or F32 for example. This kit includes everything you need; from CNC milled 4130 steel adapter plates to custom grade 12.9 fasteners. For every detail, read our Tech Article HERE. Matches perfectly with our 370mm rear brake kits!
Fiment notes for APEX Wheels can be found HERE
The calipers for this conversion come in two versions. The "370/380" marked calipers (noted via a casting mark on the back of the caliper) work with the M Adapters. If your calipers are painted, they are likely these calipers. The grey caliper version has "340" marked on the back and are from Non-M vehicles. All kits work with the dinner-plate 2-piece 380mm M2/M3/M4 rotors. These rotors are a great deal, offer a huge aftermarket rotor and pad selection to suit your driving.
As seen on "Vehicle Virals" video HERE
Install video can be found: HERE
Instruction documents can be found: HERE
Independent Install & Review: HERE
Fitment Details:
M3/M4 Front Calipers: 34116799469 and 34116799470 & other color versions available
Non-M Grey Front Calipers: 34116865538 and 34116850931. Marked 340 in the casting on the back.
Rotors: 34112284810 and 34112284809
Wheel Requirements: Wheels must have a barrel of 17" or greater to clear this setup. Fits most 18" wheels.
As with everything we make, this kit is engineered (including FEA) and manufactured here in the USA. The adapter plates are CNC machined from heat treated steel and gold zinc coated. The custom hardware is made on the CNC lathe, sent to heat treatment, and then also zinc coated for protection and good looks.
The 4 Piston Brembo calipers are a lightweight aluminum 2-piece design with stainless steel pistons. They have been proven to perform flawlessly at the track, as shown by Robert Kubica HERE. The stock 135i 6-piston Brembo is notorious for having the ceramic pistons crack after only a few track sessions. The 335i has single piston slider-type calipers that often struggle when pushed. Even after you spend a bunch of money on stock caliper upgrades, the OEM brakes still have trouble constantly slowing down these extremely fast vehicles that often have double the original power...or more.
No matter what we did on our 135i, we could not stop the brakes from overheating and fading at the track. With this kit we added over 40mm of rotor while upgrading to an aluminum rotor hat which cools down dramatically faster.
Terms and Conditions
Due to the intended use of high performance products, Seems Legit Garage, LLC. ("SLG”) products and each part thereof, are sold "AS IS” and with all faults. To the fullest extent allowed by law, SLG Racing Products makes NO written, oral, expressed, or implied statement of warranty or guarantee on any product or part sold. SLG will not be liable for any direct, indirect, incidental, consequential, or special damages, including but not limited to, damage, injury, loss of life, loss of property or equipment, loss of profits or revenue, or claims from any individual or entity arising from the use of any SLG product.
RACING IS A DANGEROUS ACTIVITY AND PURCHASERS OF SLG PRODUCTS ACKNOWLEDGE THE INHERENT RISKS ASSOCIATED. SLG MAKES NO REPRESENTATIONS THAT ITS PRODUCTS CAN REDUCE OR ELIMINATE ANY SUCH RISK. SLG products are NOT FOR STREET, HIGHWAY, OR AIRCRAFT USE and are intended ONLY for race vehicles operated on closed-course facilities or race tracks with appropriate supervision of qualified technicians or mechanics to ensure that the safety needs of the race driver and others are met. SLG products could be combined with other products or parts which may not be suitable and could adversely affect performance of other race parts or the vehicle. The user shall determine the ultimate suitability and safety of the product for its intended use, and the user assumes all responsibility and risk in connection therewith.
Instructions
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Remove brake hoses either at the caliper if you are reusing the original hoses or at the body if installing new hoses
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Remove original calipers and rotors
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Clean knuckle assembly of dirt and loose rust
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Install brackets to each caliper using the Zinc-Coated Allen Head screws and red Loctite: Torque to 70 ft/lbs
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Install 380mm F8X M3/4 rotor using the included security fastener
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Bolt caliper and bracket assembly to the knuckle using the included flanged hex-head bolts and washers: Torque to 70 ft/lbs
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Attach brake hose and bleed brakes
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Test brakes before driving to max pressure.
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Go driving and bed the pads.
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