How loud is the LEGAMAX Premium Exhaust for VA compared to stock?

Barely louder. HKS measured the LEGAMAX Premium Exhaust for VA cars at 83 dB on its close test against 82 dB for the factory system, a single-decibel step recorded on a Japanese-market WRX with the FA20 turbo. Owners who want a clearly louder VA should look at the Hi-Power SPEC-L II for the same cars.

Does it fit the WRX STI?

Yes. HKS USA names part 31021-BF001 for the US WRX STI and WRX from 2015, although its structured fitment record lists only the WRX with the FA20 turbo. Bulletproof Automotive follows the HKS product name, and STI owners are welcome to confirm fitment with the team before ordering.

What does the kit include?

HKS supplies two mid pipes and left and right rear mufflers, each muffler carrying twin 90mm tips, with the gaskets, bolts, nuts and washers needed at each joint. The factory hardware at the front flange and the factory rubber hangers are reused.

Does the WRX need a tune after installing this system?

No. HKS lists no tuning requirement for part 31021-BF001, and the kit includes no engine management. Both the FA20 turbo WRX and the EJ257 STI keep their factory calibration with the exhaust fitted, and an owner who tunes the car later can leave the system in place.

What size are the pipes and tips?

HKS lists the dual center pipes at 75mm stepping to 69mm, measured at their largest section without the silencers and tips, and the four tails at 90mm across. HKS does not publish a system weight or a ground clearance figure for this part.

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Description

HKS LEGAMAX Premium Exhaust for VA Subaru WRX and WRX STI

HKS’s LEGAMAX Premium Exhaust for VA Subaru WRX and WRX STI is the quiet, polished way to replace the factory system behind the front pipe, in SUS304 stainless with four 90mm tips framing the rear bumper. HKS measured it at 83 dB against 82 dB for the stock exhaust, so the car keeps its manners on the commute while wearing a cleaner, more finished rear. Owners who want the boxer to be heard should step to the louder HKS options for the VA; this one is for the driver who values discretion.

Features

Close sound level within a decibel of the factory system, on HKS testing
Dual center pipes joined into left and right rear mufflers, each carrying a pair of tips
Ring gaskets and M10 hardware supplied for every joint in the kit
Reuses the factory gasket, spring and bolts at the front flange and the factory rubber hangers

Specifications

Center Pipe Diameter: 75mm to 69mm, dual
Tips: 90mm, two per side
Main Material: SUS304 stainless steel
Sound Level, Factory System: 82 dB, HKS measurement
Sound Level, HKS: 83 dB, HKS measurement

Applications

Subaru WRX: VA | 2015-2021 | FA20T
Subaru WRX STI: VA | 2015-2021 | EJ257

Notes

HKS USA names the LEGAMAX Premium Exhaust for VA cars for the WRX STI and WRX, while its structured fitment lists the WRX only; this listing follows the HKS product name
Sound figures are HKS measurements on a Japanese-market WRX with the FA20 turbo and vary with the vehicle and test setup
Louder HKS rear exhausts for the VA are the HKS Hi-Power SPEC-L II Exhaust and the HKS Super Turbo Muffler
HKS notes that hangers, brackets and stays may change without prior notice

Frequently Asked Questions

How loud is the LEGAMAX Premium Exhaust for VA compared to stock? Barely louder. HKS measured the LEGAMAX Premium Exhaust for VA cars at 83 dB on its close test against 82 dB for the factory system, a single-decibel step recorded on a Japanese-market WRX with the FA20 turbo. Owners who want a clearly louder VA should look at the Hi-Power SPEC-L II for the same cars.
Does it fit the WRX STI? Yes. HKS USA names part 31021-BF001 for the US WRX STI and WRX from 2015, although its structured fitment record lists only the WRX with the FA20 turbo. Bulletproof Automotive follows the HKS product name, and STI owners are welcome to confirm fitment with the team before ordering.
What does the kit include? HKS supplies two mid pipes and left and right rear mufflers, each muffler carrying twin 90mm tips, with the gaskets, bolts, nuts and washers needed at each joint. The factory hardware at the front flange and the factory rubber hangers are reused.
Does the WRX need a tune after installing this system? No. HKS lists no tuning requirement for part 31021-BF001, and the kit includes no engine management. Both the FA20 turbo WRX and the EJ257 STI keep their factory calibration with the exhaust fitted, and an owner who tunes the car later can leave the system in place.
What size are the pipes and tips? HKS lists the dual center pipes at 75mm stepping to 69mm, measured at their largest section without the silencers and tips, and the four tails at 90mm across. HKS does not publish a system weight or a ground clearance figure for this part.

About HKS

HKS is a Japanese performance engineering brand founded in 1973 and headquartered in Fujinomiya, Shizuoka, with a long-standing reputation for developing high-quality aftermarket parts and motorsport-proven technology for enthusiast and professional applications. Known for innovations in turbocharging and engine performance, HKS produces a broad range of components including exhaust systems, turbo kits, electronics / engine management, and suspension solutions, with product development heavily influenced by decades of involvement in racing disciplines such as circuit time attack, drag, and drifting.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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HKS LEGAMAX Premium Exhaust for VA Subaru WRX and WRX STI [31021-BF001]

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HKS LEGAMAX Premium Exhaust for VA Subaru WRX and WRX STI

Features

Specifications

Applications

Notes

Frequently Asked Questions

About HKS

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