MAZDA RX7 FD3S 1992 > 2002 

Especially at high RPM, it will let you experience the smooth and powerful performance. And the sound is much better than the stock. You also don't need to reset the ECU because it doesn't have influence on stock feedback.

Stealth frame is redesigned!

"Hyper Stealth Frame" exceeds the performance of previous Super Stealth frame.
Increasing air intake surface area by 27% improves air intake efficiency.

Bold white HKS logo printed on black anodized back plate accentuates the engine bay!

The outer edge of the funnel is securely fixed to the aluminum back plate. Use of aluminum significantly improves rigidity and durability. Alumite process improves surface of the funnel and also provides a sleek black look.

Light sports

Techology

Ambient exposure type air clearner has larger area of induction inlet that increases intake air volume. Engine horsepower and torque become higher than a stock repiacement type. 
Without air clearner box, sporty intake sound is created.