Product ReviewsHKS Hi Power Series 304 Muffler Exhaust for 2014-2017 Subaru WRX STI 4d Fa20

Awesome quality.

I chose the HKS exhaust over the more common Invidia exhaust systems. The price is reasonable, and fitment is spot on. The welds and bends are top notch in quality. I highly recommend this exhaust if you want something that doesn't sound like a ricer muffler. I also noticed a slight increase in high rpm horsepower, but I can't say for certain if there's an actual increase in power, since I'm still waiting for my WRX to get dyno tuned.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: built_not_bough...