Best Brake Systems at X Factor Motor Sport: 8 Kits Ranked for Street, Truck and Restomod Builds

Direct answer: For a high-capacity truck or SUV, the Wilwood TC6R Big Brake Truck Front Brake Kit 140-8992-DR is the strongest specialist choice; for a classic American front-end upgrade, the Wilwood Forged Narrow Superlite 6R 140-10493-DR is the best all-round front kit. Mustang owners should start with Ford Performance M-2300-T, while a 1973–1987 C10 owner wanting one front-and-rear package should consider Classic Performance 7387FRBK5-BB. These are editorial rankings of products listed in X Factor Motor Sport’s Brake Systems category, not claims that X Factor tested or endorsed them.

How this ranking was made

I reviewed the X Factor Motor Sport Brake Systems catalogue, its product pages, displayed prices and product descriptions, then checked important dimensions and fitment notes against manufacturer or technical sources. The ranking weighs application clarity, braking hardware, thermal capacity, street-use features, wheel clearance, completeness of the kit and the likelihood that a buyer can verify compatibility before ordering. It does not use an X Factor road test, dyno result or independent stopping-distance test. Prices below are the displayed X Factor prices observed during research and can change.

A kit with more pistons or a larger rotor is not automatically better for every car: brake balance, master-cylinder sizing, tire grip, wheel clearance and intended use matter more than a headline specification. “Unavailable” means the reviewed X Factor page did not clearly provide the information.

Comparison of the ranked brake systems

Rank Product X Factor displayed price Position and headline hardware Minimum wheel / key caution
1 Wilwood TC6R 140-8992-DR $2,522 Front; six-piston TC6 caliper, 16-inch drilled/slotted rotor 20-inch minimum; verify wheel diagram and line kit
2 Wilwood FNSL6R 140-10493-DR $2,250 Front; six-piston forged caliper, 14-inch drilled/slotted rotor 18-inch minimum; non-ABS traditional spindles; line kit needed
3 Ford Performance M-2300-T $2,198 Front and rear; six-piston front, one-piston rear, 15/13.8-inch rotors 19-inch minimum; many factory wheels do not clear
4 Wilwood TX6R 140-14559 $2,700 Rear; six-piston caliper, 15.5-inch GTB slotted rotor 20-inch minimum; check axle offset and wheel clearance
5 Baer Track4 4301397S $2,400 Front; four-piston aluminum caliper, 13-inch one-piece rotor 17-inch minimum; exact spindle and bolt pattern required
6 Wilwood AERO4 140-11119-DR $2,270 Rear; four-piston AERO4/Dynalite caliper, 12.19-inch vented rotor Vehicle-specific; integrated mechanical parking brake
7 Classic Performance 7387FRBK5-BB $2,048 Front and rear; 13/12-inch vented rotors, two-piston front and one-piston rear 17-inch minimum; 5 x 5-inch pattern and 2.5-inch drop spindles
8 Baer Claw Extreme+ 4262692R $4,329 Rear; six-piston forged billet caliper, 15-inch two-piece rotor 19-inch minimum; Ford Super 8.8 IRS and internal-drum parking brake

The 8 best brake systems, ranked

1. Wilwood TC6R Big Brake Truck Front Brake Kit 140-8992-DR

This is the best fit for a heavy-duty truck or SUV with large wheels, high mass or towing demands. Wilwood specifies a six-piston TC6 caliper, 16-inch directional-vane rotor and BP-10 pads, engineered around OE master-cylinder output and ABS compatibility.[1] It lists Cadillac, Chevrolet and GMC applications and says 20-inch wheels may fit only after checking the clearance diagram.[1] The trade-off is packaging: a line kit is needed and wheel clearance must be verified.

2. Wilwood Forged Narrow Superlite 6R 140-10493-DR

For a traditional American muscle car or vintage-rod front end, this is the best all-round choice. The manufacturer specifies a forged six-piston FNSL6R caliper, 14-inch Spec-37 drilled/slotted rotor, radial mounting and an 18-inch minimum wheel recommendation.[2] It lists Buick, Chevrolet, Oldsmobile and Pontiac applications, but warns that the kit is for traditional non-ABS spindles, may require spindle modification and needs a front line kit.[2]

3. Ford Performance Parts Mustang 15 in. Brake Upgrade Kits M-2300-T

Mustang owners get the clearest complete-vehicle answer from this front-and-rear package. X Factor lists 15-inch front and 13.8-inch rear vented rotors, six-piston front and one-piston rear aluminum calipers, pads, hoses and a mechanical parking brake. Ford describes it as a Mustang upgrade with Brembo six-piston front calipers and 15-inch vented rotors.[4] The decisive warning is wheel fitment: most factory wheels will not fit; the listing calls for Ford Racing M-1007-SA199 or an equivalent and lists a 19-inch minimum.

4. Wilwood TX6R Big Brake Rear Brake Kit 140-14559

This is the specialist rear-system pick for an extreme truck, SUV or armored-vehicle build. Wilwood specifies six-piston radial-mount TX6R calipers, 15.5-inch one-piece GTB alloy rotors, 48 vanes, a 20-inch minimum wheel and zero axle offset.[3] Brackets, hardware and application-specific braided stainless flex lines are included.[3] It is not a complete vehicle conversion: confirm axle flange, offset, parking-brake strategy and front/rear balance.

5. Baer Track4 Disc Brake System 4301397S

Track4 is the sensible middle ground for a street-oriented classic needing a front big-brake system without a 15- or 16-inch rotor. Baer specifies a four-piston T4 caliper, 13-inch one-piece rotor, stainless-steel pistons and DOT-compliant dust and weather seals.[5] X Factor lists a 17-inch minimum wheel and no master cylinder or booster. Confirm spindle, stud pattern, offset and brake-hose requirements.

6. Wilwood AERO4 Big Rear Brake Kit 140-11119-DR

This is the strongest rear choice here when a street car still needs a mechanical parking brake. X Factor describes a four-piston forged AERO4/Dynalite caliper, 12.19-inch directional vented rotor, aluminum hat, lines, pads and integrated mechanical parking brake. Confirm the axle or spindle application, rotor offset and cable routing; “bolt-on” does not mean universal.

7. Classic Performance Complete Front and Rear Disc Brake Kit 7387FRBK5-BB

For a 1973–1987 Chevrolet C10-style build, this package covers both axles and includes a master cylinder, hoses, pads, proportioning hardware and 2.5-inch drop spindles. Classic Performance describes it as a C10 kit with 13-inch front and 12-inch rear drilled/slotted zinc rotors.[6] X Factor lists a 5 x 5-inch pattern and 17-inch minimum wheel. Confirm how the drop spindles affect geometry, ride height and wheel position.

8. Baer Claw Extreme+ 4262692R

This is the premium rear option for a Ford Super 8.8-inch IRS build where cost and wheel size are secondary. X Factor lists a six-piston forged billet aluminum caliper, 15-inch vented two-piece rotor, ceramic pads, internal-drum parking brake and 19-inch minimum wheel. Baer positions Extreme+ as its flagship road-and-track range.[7] It ranks eighth because its application is highly specific, it is expensive, and no hoses are included.

Buying guidance and compatibility cautions

Start with the vehicle, not the caliper count. Record year, make, model, axle or spindle type, ABS configuration, wheel diameter, barrel clearance, offset, bolt pattern and hub or axle-flange dimensions. Then check the manufacturer’s installation drawing. Wilwood says minimum wheel size is only a starting point; the wheel’s internal shape must clear the caliper and rotor.[1] [2] [3]

Check hydraulic compatibility before ordering. Confirm master-cylinder bore, booster output, proportioning and front/rear bias. A kit with no master cylinder or booster is not a complete hydraulic conversion.

Treat parking brakes and hoses as separate verification items. The Ford kit and Wilwood AERO4 advertise mechanical parking brakes, while Baer Extreme+ uses an internal drum. FNSL6R and TC6R identify line kits as needed. Confirm hose length, fittings, routing and whether stock hoses are approved.

Do not infer road suitability from “race” language. Rotor drilling, pad compound, seals and parking-brake design affect street use. Follow the bedding procedure, inspect for leaks and have the completed system checked by a qualified technician.

Verdict

For a truck or SUV, choose the Wilwood TC6R 140-8992-DR if your wheels and spindle application pass the clearance check. For a classic muscle-car front end, choose the Wilwood FNSL6R 140-10493-DR. For a Mustang, the Ford Performance M-2300-T is the most coherent complete package, provided 19-inch wheel clearance is acceptable. For a C10 restomod, Classic Performance 7387FRBK5-BB offers the broadest included hardware. These are application-led recommendations, not X Factor tests or endorsements.

Frequently asked questions

Are these brake systems tested or endorsed by X Factor Motor Sport?

No. This article ranks products listed on the X Factor site using published specifications and fitment evidence. It does not claim X Factor tested or endorsed any product unless the product page explicitly says so.

What is the best brake kit for a truck?

The Wilwood TC6R 140-8992-DR is the best specialist pick in this shortlist for a large-wheel truck or SUV. It uses a six-piston caliper and 16-inch rotor, but 20-inch wheel clearance and the exact application must be confirmed.[1]

Will a bigger brake kit fit my existing wheels?

Not necessarily. Minimum wheel diameter is only a guide. Caliper shape, spoke position, barrel diameter, rotor offset and wheel weights can prevent fitment. Use the manufacturer’s clearance diagram before ordering.

Does the Ford M-2300-T fit every Mustang?

No. It is an application-specific Mustang upgrade. Confirm model year, axle configuration, wheel specification and the manufacturer’s fitment notes. The X Factor listing warns that most factory wheels will not clear it.

Do these kits include a master cylinder and brake booster?

It varies. The Classic Performance 7387FRBK5-BB listing includes a master cylinder but no booster. The Ford Performance M-2300-T listing includes neither. Wilwood TC6R and FNSL6R pages identify additional line-kit requirements. Check the individual listing before purchase.

Is a six-piston caliper always better than a four-piston caliper?

No. Piston area, pad area, rotor diameter, thermal capacity, hydraulic sizing, tire grip and brake balance all matter. A correctly matched four-piston system can be better for a particular street car than an oversized six-piston kit.

What information should I have ready before contacting X Factor?

Provide the vehicle year, make and model; front or rear position; wheel diameter and part number; bolt pattern; spindle or axle details; ABS status; and whether you need a parking brake. Photos and measurements of wheel clearance and the existing brake assembly can prevent an expensive mismatch.

References