Street or Track 12x1.25" 'Trans-Am' Front Disk Brake System
This complete 'turn-key' vintage legal kit is based on the Boss 302 Trans-Am racing brake system of the late 60's.
Street or Track 12x1.25" 'Trans-AM' Front Disk Brake System for DRUM spindles
Disc brake conversion kit for 1964-73 Mustangs.
Pictures show system mounted to our optional Big Spindle (not included in this kit but highly recommended for serious track cars).
Now featuring our billet steel hubs!
Click HERE for more information.
Using only premium components, this complete 'turn-key' vintage legal* kit is based on the Boss 302 Trans-Am racing brake system of the late 60's. Using 12" x 1.25" rotors mounted to an aluminum hat this kit offers a great weight savings over the original version. Giant Kelsey Hayes style 67-Tbird calipers provide excellent clamping power and utilize the popular D1 pad. Our custom spindle bracket requires no modification to your DRUM spindles and enables the kit to fit the popular vintage legal* 15" American Racing Torq Thrust D wheels.
*You should check with your rule book to confirm exact components allowed in class before purchasing.
|Watch as we go over a few details on our 12 x 1.25" Trans-Am brake system, then watch how simple the installation is.|
Please download and use the wheel fitment template:
Fits 65-73 Mustangs, Falcons and other Fords that used the same spindles. Direct bolt on to 65-73 Mustang V8 OE drum spindles (65-67 any spindle, 68-73 drum version only). Retains OE track width and enables use of 15x7 (or larger) vintage style & backspace wheels without spacers or modifications.
Checkout real customer's installation pictures on our Facebook page:
- 2 x 67-T-bird/Lincoln style 4 piston calipers complete with cross over tubes, stainless steel pad retention clips and your choice of Porterfield R4-S street pads or R4 Racing pads. Calipers have had all the necessary machine work performed for a direct bolt on installation. Finished in a high temperature silver powder coat.
- 2 x 12" x 1.25" 2-piece heavy duty rotors with 36 directional cooling vanes. Rotors are cast and finish machined in the USA.
- 2 x Billet steel hubs machined from heat treated 4140. Screw on dust caps included (stock type dust cap can also be used if desired). Fitted with bearing races and standard length wheel studs (so you can use closed end lug nuts). 3" long ARP studs and open ended lug nuts available as an optional extra.
- 2 x Billet steel spindle/caliper mounting brackets. CAD designed, CNC machined and plated for corrosion protection.
- 2 x Timken inner bearings.
- 2 x Timken outer bearings.
- 2 x Timken inner dust seals.
- 2 x Stainless steel braided brake hoses complete with all adapters to connect to caliper and stock hard lines.
- 2 x Castle nuts (70-73 spindles use nut and castle style nut retainer).
- 2 x Cotter pins.
- Grade 8 bolts and all the hardware to install the kit.
- ARP 3" long wheel studs.
All kits are custom built to your exact specifications. If you are in a rush, please contact us to confirm current build time
|Why use such a large rotor? Well, simply put, heat. The friction created by braking creates heat and the more and harder you brake the more heat is generated. All that heat has to go somewhere and if the 'heat-sink' (rotor) gets so hot it can no longer absorb heat then the heat will migrate to other components. These other components will include brake fluid and wheel bearings, not places you want increased heat. The problem with large rotors is weight. All that weight is unsprung which will affect suspension performance and increase stopping distances.|
The rotor we use in this kit provides the best of both worlds. Increased thermal mass due to its diameter and thickness yet lighter weight when mounted to an aluminum hat. In fact, the rotor, aluminum hat, hub and stud combination used in this kit is 3lbs lighter than a standard 1970 Mustang rotor! Additionally the increased width of this rotor allows the cooling vanes to be wider resulting in more airflow for cooling.
|Caliper mounting brackets:|
SeanYou will not be disappointed. Street or Track has high standards for quality and performance, and knows how to put a brake kit together.
The Granadas were a big improvement over the stock drums on the street, and I was happy with them when I started open tracking. I was running Porterfield R4S pads and Super Blue fluid and not having problems, but now four years later I realize how slow I was then. The faster I got the more I worried about brakes. I was at the point where under heavy braking adding more pedal pressure did not slow me any faster. I thought about trying different pads and master cylinder but felt it would be a waste of time and money trying to improve that system.
Along with the new brakes I replaced my 15/16 with your 1" master cylinder and switched to R4 pads. All of this really was a major improvement. One thing that stood out was that braking actually got better throughout a 20 minute session. I found myself braking way too early because I was slowing so much faster. What I did not expect was the confidence boost. The peace of mind of having no concerns about the brakes. I still remember the feeling of being on track and realizing that I wasn't thinking about brakes anymore.
The instructions were great and having all of the parts included and everything fit right without clearance problems is exactly what I was hoping for and is exactly what I got. Absolutely worth every penny and minute spent getting them on the car.
As Charlie Jones put it in one of his Mustang Times articles, "On the track, if you're thinking about your brakes you have a problem that needs to be addressed." I was thinking about my old brakes a lot on the track but now that problem has been addressed.
BradHi Shaun, I received the T/A brake kit yesterday afternoon. Its "AWESOME"! I showed it off to all the guys at the shop, and we are all very impressed.
Full Floating 9" Rear End System - 11.75" rotors, Kelsey Hayes calipersSOT-9REAR-KH
Full Floating 9" Rear End System - 11x2.25" drum & Porterfield ShoesSOT-9REAR-DRUM
Wilwood Hi-Temp 570° Brake FluidWIL-290-0632
1/2-20" Open end steel lug nutGOR-90088
Left Hand Brake Rotor for Street or Track 'Trans-AM' Brake SystemSOT-24833
Disc brake pads for early Fords with Lincoln calipers - R4-SPOR-APD-1R4-S
Disc brake pads for early Fords with Lincoln calipers - R4POR-APD-1R4
Right Hand Brake Rotor for Street or Track 'Trans-AM' Brake SystemSOT-24834
Street or Track Mustang Front Bilstein Coilover SystemSOT-COILOVER
Street or Track 11.30'' Front Disk Brake Kit with '4S' CalipersSOT-1125-BKF
Unisteer power rack & pinion for late 67-70 Mustang w/factory airUNI-8011810-01
Free shipping - US Lower 48 Only
Adjustable Proportioning ValveALL-48025
Street or Track Tie Rod KitSOT-TIERODKIT
Outer Tie Rod End for Big Spindles - stock steeringSOT-TR.1