Low Rotating Mass
1.41 kg forged caliper and a solid Ø325 mm × 12 mm rotor keep unsprung and rotating weight down for sharper steering and faster initiation.
Shipping Estimate
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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Drift Racing DR4 Front Wheel 4-Piston Big Brake KitRacing Series Drift Front Axle 4 Piston DR4 Front 4 Piston Forged Big Brake Kit A purpose built front drift package engineered around fast steering response, repeatable lock up control, and clean pedal modulation. Two piece forged aluminum 4 piston calipers, 325 mm 12 mm two piece solid rotors, bootless racing pistons, and braided lines assembled to your chassis, knuckle, hub, and wheel package. Racing Series Drift Front Axle 4 Piston Forged 35 mm
Racing Series · Drift · Front Axle · 4-Piston
DR4 Front 4-Piston Forged Big Brake Kit
A purpose-built front drift package engineered around fast steering response, repeatable lock-up control, and clean pedal modulation. Two-piece forged aluminum 4-piston calipers, Ø325 mm × 12 mm two-piece solid rotors, bootless racing pistons, and braided lines — assembled to your chassis, knuckle, hub, and wheel package.
Racing Series — Drift
Front Axle
4-Piston Forged
Ø35 mm Pistons
Ø325 mm × 12 mm Solid Rotor
17 in Wheel Min.
Motorsport Use
Why Builders Choose the DR4
Drift braking is short, hard, and rotational. The front axle has to bite on entry, hold modulation through transition, and release cleanly without unsettling the chassis. The DR4 is sized for that duty cycle: a forged 4-piston caliper with 38.46 cm² of total piston area, paired with a Ø325 mm × 12 mm two-piece solid rotor to keep rotating mass low and steering response sharp.
Predictable Bite
Four 35 mm pistons with 38.46 cm² total area deliver linear clamp from initial pedal travel through full lock-up — critical for transitions and corrections.
Front Drift Control
Built for entry bite, modulation through transition, and clean release without upsetting the chassis.
Bootless Racing Pistons
Racing pistons without dust boots reduce seal drag and tolerate sustained caliper temperatures that would punish a street kit.
Pad Flexibility
Industry-standard motorsport pad footprint lets you tune entry bite, lock-up window, and endurance behavior without changing hardware.
Vehicle-Specific Engineering
Bracket geometry, rotor hat offset, and brake line fittings are engineered per application — not shipped as a universal upgrade.
Technical Specifications & Kit Options
| Brake Caliper | |||
|---|---|---|---|
| Series | Racing Series — Drift | ||
| Model / Application | DR4 | ||
| Axle Position | Front | ||
| Piston Count | 4-piston | ||
| Piston Type | Racing pistons without dust boots | ||
| Piston Diameter | 35 mm | ||
| Total Piston Area | 38.46 cm² per caliper | ||
| Caliper Dimensions | L 178 mm × W 82 mm × H 106.5 mm | ||
| Manufacturing Process | Two-piece forged aluminum body | ||
| Net Weight | 1.41 kg per caliper, without pads | ||
| Surface Finish | High-temperature gloss coating | ||
| Chrome Finish | Not available on this model | ||
| Recommended Wheel Size | 17 in or larger | ||
| Primary Rotor Size | Ø325 mm × 12 mm | ||
| Brake Rotor Options | |||
| Rotor Option | 325 mm Steel | 330 mm Steel | 343 mm Steel |
| Rotor Material | Heat-treated high-carbon cast iron | Heat-treated high-carbon cast iron | Heat-treated high-carbon cast iron |
| Axle Position | Front | Front | Front |
| Rotor Dimensions | Ø325 mm × 12 mm | Ø330 mm × 12 mm | Ø343 mm × 11 mm |
| Construction | Two-piece rotor assembly | Two-piece rotor assembly | Two-piece rotor assembly |
| Ventilation | Solid | Solid | Solid |
| Mounting | Fixed | Fixed | Fixed |
| Rotor Hats | Application-specific CNC-machined aluminum alloy hats | Application-specific CNC-machined aluminum alloy hats | Application-specific CNC-machined aluminum alloy hats |
| Directional Design | Yes — left/right specific | Yes — left/right specific | Yes — left/right specific |
| Rotor Face Pattern | Curved slot | Curved slot | Curved slot |
| Recommended Use | Primary DR4 matched engineering spec | Custom wheel and bracket geometry requirement | Custom wheel and bracket geometry requirement |
| Brake Pads | |||
| Compatible Rotor Material | Iron / steel rotors only | ||
| Operating Temperature | 0–600 °C | ||
| Average Friction Coefficient | μ ≈ 0.38, varies with temperature, line pressure, and rotor condition | ||
| Compound Tuning | Motorsport pad shapes allow compound changes for entry stability, lock-up control, or endurance heat | ||
| Lines, Brackets & Service | |||
| Brake Line Construction | Three-layer reinforced construction | ||
| Brake Line Material | PTFE inner liner / SUS304 stainless braid / PVC outer sheath | ||
| Caliper Mounting | Radial mount with vehicle-specific caliper brackets | ||
| Caliper Brackets | Vehicle-specific CNC-machined carbon-steel caliper brackets | ||
| Rotor Hats | CNC-machined high-strength aluminum alloy rotor hats matched to hub geometry and rotor offset | ||
| Brake Line Fittings | Vehicle-specific; caliper-side and chassis-side ends vary by application | ||
| Wheel Clearance | 17 in or larger wheel required; final clearance depends on wheel diameter, width, offset, spoke profile, rotor size, and bracket package | ||
| Bedding-In Procedure | Required before hard use | ||
The DR4 caliper is engineered around a Ø325 mm × 12 mm rotor. Steel rotor packages in 330 mm × 12 mm and 343 mm × 11 mm are available through the custom build sheet when wheel and bracket geometry require them. Final rotor selection is confirmed during the build review.
Package List
Calipers ×2
2 × DR4 front two-piece forged 4-piston calipers with high-temperature gloss coating.
Brake Pads
Brake pads for both front calipers, 0–600 °C pad window, intended for iron / steel rotors.
Brake Rotors ×2
2 × two-piece solid front rotors, primary Ø325 mm × 12 mm specification or custom 330 / 343 mm steel package when approved.
Caliper Brackets ×2
Vehicle-specific CNC-machined carbon-steel radial caliper brackets.
Rotor Hats ×2
CNC-machined high-strength aluminum alloy rotor hats matched to front hub geometry and rotor offset.
Brake Hoses ×2
Three-layer stainless-steel braided front brake lines with PTFE inner liner, SUS304 braid, and PVC outer sheath.
The Bespoke Engineering Process
Every DR4 front drift system is engineered around the vehicle’s front knuckle, hub location, rotor hat offset, wheel barrel, spoke clearance, master cylinder, brake line routing, steering angle, suspension package, and intended drift use. The goal is not a generic universal fit; the goal is a front brake package that works with your chassis geometry and gives the driver repeatable bite, lock-up control, and clean pedal release during initiation and transition.
1. Technical Consultation
We review the chassis, year, front suspension and knuckle setup, hub spec, master cylinder, steering angle, wheel package, tire package, target front brake behavior, and whether the car uses OEM or custom front uprights.
2. Data Submission
For OEM knuckles, provide chassis, year, knuckle / hub spec, master cylinder, and wheel data including diameter, width, offset, and spoke profile. For custom uprights, provide CAD files, technical drawings, hub-face data, rotor mounting dimensions, or accurate bracket mounting-point measurements.
3. Engineering Review & Approval
TTSPORT confirms rotor size, caliper bracket geometry, rotor hat offset, brake line ends, caliper color, pad choice, wheel clearance, and installation notes before production, QC, and shipment.
If you are unsure whether your wheel, front knuckle, rotor offset, master cylinder, steering-angle package, or brake line routing is suitable, Contact us before ordering so the engineering team can review the build details.
Installation & Break-In
- This kit is engineered for motorsport and closed-course use.
- DR4 uses radial-mount calipers with vehicle-specific brackets and application-specific brake line fittings.
- Final rotor size, bracket geometry, rotor hat offset, and brake line ends are confirmed during the build review.
- Recommended minimum wheel size is 17 in; larger rotor options require verified wheel and spoke clearance.
- Bedding-in procedure is required before hard use to transfer pad material and stabilize friction.
- Inspect bootless pistons, seals, pad backing plates, and rotor face wear between competition sessions.
- Check braided line ends, banjo bolts, and bracket fasteners after each event.
- Use clean DOT 4 or higher racing brake fluid; flush per event schedule.
This kit is engineered for motorsport and closed-course use. Bootless racing pistons require shop discipline and inspection intervals beyond a typical street BBK.
Frequently Asked Questions
What vehicles does the DR4 front drift kit fit?
The DR4 is a motorsport front big brake kit that uses radial-mount calipers with vehicle-specific brackets and application-specific brake line fittings. Fitment is engineered per chassis, knuckle, hub, and wheel package. Confirm your chassis, suspension, and wheel setup with TTSPORT before production so the bracket, rotor offset, and line ends are built correctly.
What rotor size does this kit use and what wheel clearance is required?
The matched engineering spec uses a Ø325 mm × 12 mm two-piece solid rotor with 4-piston forged calipers. Caliper dimensions are L 178 mm × W 82 mm × H 106.5 mm. Recommended minimum wheel size is 17 in. Larger rotor diameters such as 330 mm × 12 mm or 343 mm × 11 mm steel options are available through the build sheet; clearance must be verified with your wheel and spoke profile.
Why solid rotors and bootless racing pistons on a drift kit?
Drift use generates short, sharp front-axle braking and trail-braking inputs, but the front rotor runs a narrower effective duty cycle than circuit racing. A solid Ø325 mm × 12 mm rotor saves rotating mass and improves steering response, while bootless racing pistons reduce seal drag and tolerate higher caliper temperatures. Both require regular inspection and competition-style service intervals.
What is the operating window of the included pad and can I change compounds?
The supplied pad runs 0–600 °C with an average friction coefficient around 0.38 on iron or steel rotors. Actual μ varies with temperature, line pressure, and rotor condition. The caliper accepts a range of motorsport pad shapes, so you can shift compound and bite characteristics for entry stability, lock-up control, or endurance heat without changing hardware.
Is bedding-in required and how should I service the kit?
Yes. A proper bed-in cycle is required to transfer pad material onto the rotor face and stabilize friction before hard use. For competition service, inspect pistons, seals, pad backing plates, rotor face wear, and braided line ends between sessions. Bootless pistons demand cleaner shop discipline than street calipers.
Can I customize caliper color, rotor size, or bracket spec?
Yes. The DR4 is built to order. Rotor sizing, bracket geometry, and brake line lengths are tailored to your build. Chrome finish is not available on this caliper. Send your chassis, hub, knuckle, master cylinder, and wheel data to start a build.
Ready to spec your DR4 drift build?
Send your chassis, year, knuckle / hub spec, master cylinder, wheel data, steering-angle package, and intended drift use. TTSPORT will confirm rotor size, caliper color, pad choice, rotor hat offset, bracket geometry, and brake line fittings before production.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
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Product Reviews
★★★★★ 4
Good Pillows to Show Off Decorative Pillow Shams
Size: Queen - 20"*30" (pack of 2), Color: Grey
Although we have queen-sized beds, we typically use standard-sized pillows. One of the quilt sets I got this Christmas time came with queen sized pillow shams, and the standard pillows just didn't fill them properly. I could have sewn flanges on either side of the shams, but I decided to order these pillows instead. The are almost wide enough to fully fill those shams that started all this additional purchasing. (I also ended up ordering pillow protectors for the queen sized pillows.)
The pillows are fluffy and substantial for now. My husband manages to flatten out pillows almost no matter how they start our. For now, so far so good. They re a medium-weight and fullness, I would say. They do a good job of showing off the pillow sham design, so that's a plus. I'm not planning for us to sleep on them, but they are added back support while watching TV. They are primarily for decorative purposes when the bed is made with the quilt and shams. They were a reasonable value for the intended purpose.
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Reviewed in the United States on January 5, 2026
★★★★★ 5
Nice Pillows
Size: Queen - 20"*30" (pack of 2), Color: Grey
These pillows are comfortable, good firm support, material seems to be good. Let fluff up for 24 hours and they were ready for use. So far the don't go flat...
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Good sleep
Size: King - 20"*34" (pack of 2), Color: Grey
Soft, but firm,good sleeping pillows
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Good find for the money
Size: King - 20"*34" (pack of 2), Color: Grey
These pillows puffed right up and they are soft and comfy to sleep on. Good find for the money
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Excellent pillows
Size: Queen - 20"*30" (pack of 2), Color: Grey
Very nice pillows seem well made perfect size after a couple of days the filling is absolutely perfect provides plenty of support
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
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