D1 Spec is a performance tuning brand inspired by Japanese motorsport heritage, offering affordable yet high-quality upgrades for enthusiasts. Known for its precision-engineered brake systems, suspension components, and accessories, D1 Spec delivers reliable performance and aggressive styling at an accessible price point.
Designed for everyday drivers and weekend racers alike, D1 Spec products provide an excellent balance between performance, durability, and value — making them a popular choice for those seeking serious upgrades without the premium cost.
A performance upgrade that won’t break the bank — the D1 Spec 4-Pot kit delivers strong, fade-resistant braking with 330mm slotted rotors, sport brake pads, and stainless steel lines.
![Front D1 Spec Big 4 Pot Caliper w/ 330mm Rotors, Brake Pad, Bell, Brackets & Steel Braided Hose [17" Compatible]](http://pitstopautoclub.com/cdn/shop/files/Product_D1SpecBig4PotCaliper.png?v=1761888777&width=1445)