WTAC Rear Brake Kit

WTAC Rear Brake Kit
WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit WTAC Rear Brake Kit
Price: $430.00
Availability: In Stock


*All prices exclude GST(Tax) and will be calculated during checkout. International customers do not pay tax*

*Pictures are for illustration purposes only and may differ to your order*


Evo 350mm Brembo Brakes - Standard (Bolt-On) Edition


Yokohama World Time Attack Rear Brake Kit (No spacers)


In a nutshell, this is a cheaper version of our Evo 350mm Brembo Rear Brake Adapter Kit to meet the rules of the Yokohama World Time Attack Challange. The WTAC rule 10.1(c) states:

“Original hub location must be retained”

We have a number of customers competing at Yokohama's World Time Attack Challenge and we ourselves are competing at WTAC - as usual we play fairly and we play by the rules. There were also many of you guys asking for a rear big brake upgrade with no spacers, sooooooo we eliminated the 6mm hub spacers and the trick to installation is to remove a bit of material from the caliper. The size of material to remove is about the size of your thumb tip. This is required to make room for the OEM knuckle.

Evo 350mm Brembo Brakes - World Time Attack Edition
WTAC Rear Brake Kit (No spacer) - requires modification to the caliper as shown above



The good news is because there are fewer parts in this kit, the price is reduced, installation is faster, your wheels aren’t spaced out and there’s less weight for more speed :)

Everything else remains the same as the Evo 350mm Brembo Rear Brake Adapter Kit, so…






Do you want a better Brembo rear brake upgrade than the Skyline GTR Brembo brakes for around the same costs?

  • Balanced brake bias
  • Incredible stopping power
  • World’s biggest selection of brake pads and rotors
  • Great bang for bucks

Here's what we engineered: Evo Brembo rear calipers + Alpha Omega Racing aerospace billet caliper adapters + 370z 350x20mm rotors.


Evo 350mm Brembo Brakes
WTAC Rear Brake Kit



We use the excellent and cheap Brembo brake calipers from the Mitsubishi Lancer Evolution 5, 6, 7, 8 and 9 (they are all the same) – newer in both design and age it also features dual bleed nipples, quick pad changes and the all important dust boots... unless you like dirt grinding down your pistons or having to do frequent rebuilds.

They are also larger and more rigid which all add up to give 'more' braking, better feel, better modulation and ultimately better control on the limit. Parts are everywhere so your choices are virtually endless!


Evo 350mm Brembo Brakes
Standard Nissan 2 Pot Rear



We chose this size rotor for an ideal brake balance bias and a bolt on fit. It's a Nissan 370z rear rotor so replacement parts are easy to get from budget friendly 1-piece to race-ready 2-piece. These are BIG to provide enormous stopping leverage and heat handling capabilities to ultimately give you incredible brakes.

Balancing brake bias required some math and rounded off to the nearest percent, our bias calculations put the “gold standard” Skyline GTR32/33/34 front and rear Brembos at 70:30. Using the front Alpha Omega Brakes (EVO 350mm Brembo) with a theoretical rear “EVO 350mm Brembo” gave us a super excellent 69:31 bias. To double check our math we turned to Google and found this page: http://www.tceperformanceproducts.com/bias-calculator

Using that calculator it also puts the standard GTR Brembo setup at 70:30 and the Alpha Omega Brakes Front and Rear (EVO 350mm Brembo) at 68:32 – a negligible 1% difference to our calcs. Here’s an interesting fact: the R34 Skyline GTR V-Spec 2 Nür / N1 models are the best production GTR34s ever made and they too have a brake bias of 68:32! It achieves this bias by using a larger rear rotor which is “coincidently” what we’ll be doing.


Thus we found ourselves a winning rotor! The Nissan 370z rear 350x20mm rotors fit the bill like a glove – cheap, fits, buy them anywhere, matches the EVO Brembo rear caliper and the bias is better than gold standard excellent! It’ll also look pretty frigging boss with big 350mm Brembo brakes all round to fill up your wheels.


Evo 350mm Brembo Brakes
Standard R34 GTR Rear



ALPHA OMEGA caliper adapters are 100% CNC machined billet alloy, grade 7075, T6 heat treated. The 7075-T6 alloy is commonly known as "aerospace alloy" because, as you can probably guess, it's used extensively in aircrafts for its light weight and high strength qualities. As with all bigger rotor upgrades there is approximately 3mm of pad overhang which is a small tradeoff for the larger rotor, stronger caliper adapters and just plain awesome brakes.

We make the kit right here in Australia so that you know the quality is excellent.


Evo 350mm Brembo Brakes
Alpha Omega Racing'a Evo 350mm Brembo Brakes

Evo 350mm Brembo Brakes
WTAC Rear Brake Kit



  • 100% CNC machined billet 7075-T6 aerospace alloy adapters
  • Full handbrake functionality
  • Balanced brake bias
  • Bigger calipers
  • Bigger rotors
  • Amazing brakes
  • Made in Australia so you know it's done right



All measurements are in millimeters unless otherwise specified.

Car Caliper Piston Sizes Rotor Sizes Pad Sizes Master Cylinder Size
Silvia 180sx/S13
1x38 258x9 85x43x14 13/16"
Silvia/200sx S14,S15
1x38 258x9 85x43x14 15/16"
300zx Z32 Turbo
2x38 297x18 73x55x16 17/16"
350z Z33 Brembo
2x40 322x22 77x66x13 17/16"
Skyline R32 GTST
2x38 297x18 73x55x16 16/16"
Skyline R32 GTR (NON Brembo)
2x38 297x18 73x55x16 16/16"
Skyline R33 GTS25T
2x38 297x18 73x55x16 15/16"
Skyline R34 GTT
2x38 297x18 73x55x16 16/16"
Skyline R23,R33,R34 GTR Brembo
2x40 300x22 77x66x13 17/16"
Evo 5, 6, 7, 8, 9
2x40 300x22 77x66x13 17/16"
ALPHA OMEGA Brakes: Rear
(Evo 350mm Brembo)
2x40 350x20 77x66x13 17/16"




  1. Pair of CNC machined 7075-T6 billet aerospace alloy caliper adapters (rear left and rear right)
  2. Various high tensile bolts and high tensile washers
  3. Full installation instructions with pictures

You need to get the following parts to make it all work:

  1. Mitsubishi Lancer Evo 5, 6,7, 8 or 9 Brembo rear calipers (including pads/pins/shims/clip)
  2. Nissan 370z rear 350x20mm rotors
  3. Custom brake lines

Silvia (180SX/S13/S14/S15) drivers who want a functioning handbrake will need to use the R32/R33/R34/Z32 rear drum setup, a very common upgrade.

These are big brakes so you’ll need minimum 17" wheels. We do not keep track of what wheels fit as there are just too many different brands, models, widths, offsets, face types and style combinations - but some nice customers have sent us installed photos including specifications of their wheels; the photos and specs have been uploaded to the Alpha Omega Racing Facebook page - check them out in the 'Photos > Albums' and whilst you're there, give us a Like =) Trimming of dust shield is required. A BM57 17/16” brake master cylinder is recommended.


You specify what Nissan you drive at the end of the checkout process, that way we know what parts to ship to you.

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