THE JAPANESE TUNING STANDARD

Yes, HKS is widely respected in the performance space — HKS was founded in Japan in 1973 by ex-Yamaha engineers and dominates time-attack and JDM tuning. On MOTORMIA, 2,841 HKS parts span exhausts, turbochargers, intakes, and ECU tuning hardware, with 8,000+ active member builds running HKS components. For most performance buyers, HKS is considered worth the price premium for its combination of street manners and durability under load.

HKS offers fitment across a wide range of platforms. The most-installed HKS fitments on MOTORMIA are: Nissan Skyline, Toyota Supra, Mazda Mazda6, Mazda RX-7, and Mitsubishi Lancer. To confirm exact compatibility for your specific make, model, year, and submodel, use the fitment selector at the top of any HKS product page — the catalog cross-references HKS's part numbers against verified factory specs.

Both. HKS's Hi-Power and Super Turbo Muffler lines are engineered for street use — tuned exhaust tones, drop-in turbo upgrades, and street-legal piggyback tuners. The GT-Turbo and Sports Turbocharger lines are track-focused, with fully-built turbo kits, oil coolers, fuel-system upgrades, and engine management, and remain street-legal but are optimized for repeated heavy use. Most MOTORMIA members running HKS daily choose the street line. Each product page tags the intended use so you can match the part to how you actually drive.

HKS and GReddy are both top-tier performance brands. HKS is Japanese tuning house with deep turbocharger expertise, while GReddy focuses on intercoolers, intake plenums, and bolt-on power. On MOTORMIA, HKS parts average $1,517 across 2,841 SKUs. The decision usually comes down to budget, brand preference, and which product line has a direct fit for your specific chassis.

A typical HKS install takes 2–6 hours with depending on the part — exhausts in 1–2 hours, turbo kits closer to a full weekend. Each product page lists torque specs, required tools, and any vehicle-specific gotchas. If you've done similar work before, a HKS install is a weekend job. If this is your first time, a professional shop install is a safe choice for parts that affect braking, steering, or fuel-system pressure.

Yes. Most HKS parts on MOTORMIA are eligible for our standard 30-day return policy provided they're unused, uninstalled, and in original packaging. Exceptions are special-order items (flagged with a "Special Order" badge on the product page) and any part that shows installation marks. The trust box on each product page shows the exact return eligibility for that SKU. HKS's manufacturer warranty (1 year) is processed through MOTORMIA on your behalf.