HKS SUPER TURBO MUFFLER ER34(4dr)

The HKS Super Turbo Muffler is a high-performance cat-back exhaust system designed for performance and sound enhancement. It meets JASMA standards, offering optimized exhaust efficiency and sound pressure reduction. Engineered for Nissan Skyline ER34 4-door chassis with the RB25DET engine (one source also mentioned RB26), it's compatible with stock to high-performance vehicles with upgraded turbines. Features include an 85mm straight pipe, optimized layout for stock clearance, and HKS' "Slotted Tail" design (inspired by owl feathers) which reduces air friction vibration and lowers sound by approximately 2dB. This provides optimal tones inside and outside the vehicle while minimizing uncomfortable low frequencies.