View Spec →Braking
Monobloc Caliper
One block of forged aluminum, six pistons, zero flex. The part every other part is measured against.
$178Add +
Graded Auto Supply
Graded
A1.
Precision-made parts and care, spec-verified and marked A1. In a category built on knockoffs, we sell the one thing you can't fake — a standard.
A1-BRK-6P · Forged 6061-T6 · Pressure-verifiedThe Idea
The aftermarket shelf is full of re-boxed generics, mystery tolerances, and parts that fail the day the warranty ends. We built A1 to sell the opposite: a grade you can trust.
Not more parts. Better ones — each measured, serialized, and marked A1 before it earns a place on your car.
The Edit
Full CatalogBest in grade
View Spec →
View Spec →Detailing & Care
Ceramic Coating
A years-long layer of glass over your paint. One application, then water — and dirt — just leaves.
$79Add +
View Spec →Engine & Fluids
Oil Filler Cap
The smallest upgrade you'll touch every oil change — and the one that feels like the whole car.
$34Add +
A1-BRK-6PThe Halo · Braking
Monobloc Caliper
One block of forged aluminum, six pistons, zero flex. Hard-anodized, pressure-tested to twice its rated line pressure, and serialized before it earns the stamp — the part every other part is measured against.
- Body
- 1-pc forged 6061-T6
- Pistons
- 6 · differential bore
- Seals
- HT viton, 300°C
- Finish
- Type-III hard anodize
View — $178Forged · Not cast
The A1 Standard
What the mark means
Anyone can print “premium.” A1 is a grade you can audit — four things every part clears before it ships.
01
Spec-verified
Every part is measured against a published spec before it ships. The number on the box is the number in your hand — no optimistic rounding, no marketing tolerances.
02
Serialized
Each part carries a laser-etched serial tied to its own inspection record. Counterfeit it and it fails the lookup. The grade isn't a sticker you can print — it's a chain you can trace.
03
Proof-tested
Hardware is tested past its rated load; fluids past their rated temperature. We break the sample so yours never has to find its limit on the road.
04
Standard-guaranteed
If a graded part ever falls below the standard we sold you, we replace it — for as long as you own it. The grade is a promise we keep, not a claim we make.
2×
Proof-test margin
±2%
Torque tolerance
100%
Serialized parts
0
Knockoffs, ever
Under the hood
If it wouldn't go on our car, it doesn't go on yours.
Departments
All DepartmentsBuilt by category
A1-KIT-GRThe Kit · Gift the Standard
The Garage Kit
Six A1 essentials — the billet oil cap, the magnetic drain plug, titanium valve caps, the 9H ceramic kit, pH-neutral wash and a microfiber set — cradled in a foam-cut, embossed A1 case. The most complete way to start, and the most rewarding way to gift.
View the Kit — $278Save vs. separate
The grade isn't a sticker.
It's a standard you can trace.
— The A1 Doctrine
The Catalog
25 SKUs · $17–$278Everything, graded
View Spec →Braking
Track Pads
A compound that comes in cold and never fades hot — full axle set, chamfered and slotted.
$58Add +
View Spec →Braking
Vented Rotor
Cast, drilled, and balanced to spin true — the surface your pad deserves.
$74Add +
View Spec →Engine & Fluids
Magnetic Drain Plug
Catches the metal your filter can't. What you see at the next change tells you everything.
$22Add +