Catback Exhaust System 4" Quad Muffler Tip w Polished Tip for 2015-2022 Subaru WRX / STI

• 2015-2022 Subaru WRX

• 2015-2022 Subaru WRX STI

Frequently Asked Questions: 2015-2022 Subaru WRX / STI 4" Quad Tip Catback Exhaust

Q1: Will this subaru wrx sti catback system fit both the WRX and the STI models?

A1: Yes! This subaru wrx sti catback system is engineered as a direct bolt-on upgrade for both the 2015-2022 Subaru WRX (2.0L FA20 engine) and the WRX STI (2.5L EJ25 engine). The chassis layout for the exhaust is the same, so it will fit either model perfectly.

Q2: I have a 2020 model. Is this 2020 wrx catback exhaust a direct bolt-on, or do I need to weld it?

A2: No welding or cutting is required. Whether you are installing this 2020 wrx catback exhaust or fitting it to a 2015 STI, it features a 100% direct bolt-on design. It utilizes CNC machined flanges that align perfectly with your factory exhaust hangers and downpipe.

Q3: How much horsepower can I expect to gain from this 3" catback exhaust?

A3: By replacing the restrictive factory exhaust with our 3-inch mandrel-bent piping and straight-through mufflers, you significantly reduce backpressure. Most vehicles see a noticeable improvement in throttle response and an average gain of 10-15 extra horsepower.

Q4: What does this exhaust sound like? Will it give my car that classic Subie rumble?

A4: Absolutely. This system produces a strong, deep, and aggressive tone. If you drive an STI, it will dramatically enhance that iconic unequal-length header "Subie Rumble." For WRX owners, it provides a much deeper, more refined, and aggressive sound compared to the quiet stock exhaust.

Q5: Do I need an Accessport or a custom tune after installing this catback?

A5: No, a tune is not strictly required. Because this catback system bolts on after your factory catalytic converter (downpipe), it will not trigger a Check Engine Light (CEL) or alter your air/fuel ratios to dangerous levels. However, getting a tune is always recommended if you want to maximize your power gains.

Q6: How big are the quad muffler tips, and will they fill out the rear bumper cutouts?

A6: The system features aggressive 4-inch quad outlet tips with a stunning polished/burnt finish. These 4" tips are significantly larger than the stock tips and are specifically designed to perfectly and aggressively fill the factory rear bumper valance of the VA chassis.

Q7: Will this exhaust system rust easily in areas with harsh winters and road salt?

A7: No. This entire FLASHARK exhaust system is crafted from premium T-304 stainless steel and features a fully polished surface. T-304 stainless provides superior durability and excellent resistance against rust and corrosion, making it ideal for all weather conditions.

Q8: Does this exhaust system have terrible drone at highway speeds?

A8: While it is designed to be a loud, sports-oriented exhaust under heavy acceleration, the mufflers feature a double-layer silencer design. This helps control the sound frequencies, minimizing annoying cabin drone during steady-state highway cruising so you can still enjoy your daily commute.

Q9: Will this 3-inch catback bolt up to an aftermarket 3-inch downpipe in the future?

A9: Yes! This system uses 3" main piping. If you decide to upgrade to an aftermarket 3" downpipe/J-pipe later on, this catback will mate up perfectly (an adapter may be needed depending on the downpipe brand) to create a full 3-inch turbo-back exhaust system for maximum flow.

Q10: Does the package include the necessary gaskets and hardware?

A10: Yes, your purchase includes the high-quality gaskets and hardware needed to securely bolt the exhaust sections together and mount it to your vehicle. It's a comprehensive kit designed for an easy, hassle-free installation.