The brake kit has arrived and ULTRA it is.

CR4 4-Piston Caliper

Product Specifications:

Caliper Size: 225mm L x 140mm W x 80mm H
Caliper Body Construction: 2 halves
Caliper Body Material: 6061-T6 forged

Piston Sizes: Ø 38mm x 4
Piston Material: 6061-T6 billet
Piston Style: Regular
Piston Finish: Type III hard anodized

Weight per caliper: ± 2250g (without pads)

Dust Boot: Interior
Oil Line: Exterior

Min. to max disc size: Ø 280mm (11") to Ø 340mm (13.4") diameter
Min. to max disc thickness: 22mm to 30mm

Brake pad sizes:
CR4-50D = 110mm L x 69.5mm H x 50mm D
CR4-55D = 120mm L x 71.5mm H x 55mm D

Caliper finish: Anodized
Available colors: Anodized Red, Sapphire Blue, Energy Green (powder coated), Deep Gunmetal

The ProdigyWerks CR4 4-Piston Caliper is designed as a high-performance upgrade and replacement for factory sliding calipers without requiring a full-scale brake conversion.

This caliper is engineered to work with existing factory rotors/discs, meaning you do not need to replace your current OEM rotors. This allows you to retain most of the factory brake system while upgrading to significantly improved braking performance.

The CR4 features four 38mm pistons per caliper, delivering increased clamping force and improved performance compared to factory setups.

The limitation with factory brakes has always been the calipers—they are typically floating designs using a single large piston paired with a relatively small brake pad surface, resulting in reduced braking area and performance.

This kit replaces those factory calipers with a fixed 4-piston design, along with Teflon-coated steel lines and performance street pads, improving pedal feel, modulation, and overall stopping performance.

It’s time to ditch the floating calipers and upgrade to OEM+.

Comments

Oil catch can system UPGRADE.

A bigger catch can means less frequent drainage. The race-inspired baffled system, combined with a built-in surge tank design, allows for spirited driving without the can filling up too quickly. Is the CTS catch can worthwhile? Absolutely. For normal daily driving and relatively stock to Stage 1 cars, I can honestly recommend it. In my case, I’m constantly working on improving my Audi TT Quattro in order to surpass tuned TTS power, which is why I post pictures and videos of my upgrades as they happen. Best.

After the rebuild came the OEM+ tune up.

turbo. Months of pampering had finally come to their climax—the break-in period had been reached, and the TT was finally ready for its tune-up. However, this was not going to be your usual filter-and-plugs ordeal, not in the slightest. I had spent weeks, if not months, researching the known weak points of the EA888.2 engine and made it my mission to ensure they were addressed. The first was the consistently problematic positive crankcase ventilation (PCV) plate integrated into the aluminum valve cover. This emissions system is designed to route gases that enter the crankcase back into the intake stream to be reburned in the combustion chamber. However, it is prone to failure, often without warning, allowing oil to enter...

Racingline Oil catch can dump (1 winter month)

I went from having to empty the contents of my CTS Turbo oil catch can biweekly to only needing to empty the RacingLine oil catch can monthly. Since it’s winter in Canada, temperatures can swing from +5°C to -15°C in the same day. With these constant temperature changes, it’s safe to say that not everything collected in the catch can is oil blow-by. Because of this, I needed a catch can with a larger containment capacity. The RacingLine unit provides exactly that, along with a high-flow baffle system that continues to function effectively even when it is up to 3/4 full. As you can see, the car hasn’t been significantly modified since my last update, but the OEM+ upgrades have been very rewarding. An OEM+ brake upgrade is in the works, along with a new wheel and tire setup. Stay tuned.

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