Does the LEGAMAX Sports Exhaust for RV37 Infiniti Q50 replace the whole exhaust?

No. The HKS LEGAMAX Sports Exhaust for RV37 Infiniti Q50 is the left and right main mufflers only, each with a 110mm titanium tip, and the rest of the factory exhaust stays on the car. The mufflers fit with the 68mm gaskets and flange nuts in the kit and hang on the factory rubber hangers.

Which Q50 models does it fit?

HKS lists part 31021-AN012 for the V37 Infiniti Q50 with the 3.7L VQ37VHR V6 from 2014 to 2016, and with the VR30DDTT twin-turbo V6 from 2016 to 2025. HKS developed it as the Skyline 400R muffler in Japan, and its fitment record shows rear-wheel drive, so owners of all-wheel-drive cars should confirm fitment first.

How loud is it compared to the factory exhaust?

HKS measured 83 dB on its close test against 79 dB for the factory system, and 59 dB against 55 dB at idle. HKS describes a moderate sound at idle and on a light cruise, with an aggressive deep tone that suits a high-power V6 when the throttle opens.

Does the Q50 need a tune after installing this muffler?

No. HKS lists no tune requirement for part 31021-AN012, and the kit includes no engine management. Only the main mufflers change, so the LEGAMAX Sports Exhaust for RV37 can stay on the car as a build develops, whether or not the car is tuned later.

How much ground clearance does it leave?

HKS lists 127mm of minimum clearance on stock suspension, with the factory front pipe as the lowest point rather than the HKS mufflers. Owners on lowering springs or coilovers, such as the HKS HIPERMAX S for RV37, should check the gap under the car before regular use.

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Description

HKS LEGAMAX Sports Exhaust for RV37 Infiniti Q50

HKS’s LEGAMAX Sports Exhaust for RV37 Infiniti Q50 replaces the factory main mufflers on the V37 Q50 sedan with a pair of SUS304 stainless mufflers, each finished with a 110mm titanium tip. HKS tuned it to stay moderate at idle and on a light cruise, then turn to an aggressive, deep tone when the throttle opens, and measured 83 dB against 79 dB for the factory system. It suits the Q50 owner who wants a better rear view and more voice from the V6 without replacing the whole exhaust. HKS also makes the HKS Dual Muffler Exhaust for Infiniti Q50 (32009-BN005) for the V37 Q50.

Features

Left and right main mufflers in SUS304 stainless steel
110mm titanium tip on each side
60.5mm pipe on each side
Sound kept moderate at idle and cruise, with a deep tone under throttle
Fits with 68mm gaskets and flange nuts supplied in the kit, and reuses the factory rubber hangers

Specifications

Main Pipe Diameter: 60.5mm x 2
Tips: 110mm titanium, left and right
Main Material: SUS304 stainless steel
Sound Level, Factory System: 79 dB (55 dB at idle), HKS measurement
Sound Level, HKS: 83 dB (59 dB at idle), HKS measurement
Minimum Road Clearance: 127mm at the factory front pipe, stock suspension
JASMA Certification: JQR20212096

Applications

Infiniti Q50: V37 | 2014-2016 | VQ37VHR
Infiniti Q50: RV37 | 2016-2025 | VR30DDTT

Notes

The LEGAMAX Sports Exhaust for RV37 Infiniti Q50 replaces the left and right main mufflers only; the rest of the factory exhaust stays in place
The HKS US datasheet lists the 2014-2016 VQ37VHR Q50 and the VR30DDTT Q50 from 2016 on; HKS Japan lists the part for the Skyline 400R only
The HKS USA fitment record shows rear-wheel-drive cars, so owners of all-wheel-drive cars should confirm fitment before ordering
HKS lists 12.7kg (28.0lb) with the packing dimensions and does not publish a separate product weight
HKS notes that hangers, brackets and stays may change without prior notice

Frequently Asked Questions

Does the LEGAMAX Sports Exhaust for RV37 Infiniti Q50 replace the whole exhaust? No. The HKS LEGAMAX Sports Exhaust for RV37 Infiniti Q50 is the left and right main mufflers only, each with a 110mm titanium tip, and the rest of the factory exhaust stays on the car. The mufflers fit with the 68mm gaskets and flange nuts in the kit and hang on the factory rubber hangers.
Which Q50 models does it fit? HKS lists part 31021-AN012 for the V37 Infiniti Q50 with the 3.7L VQ37VHR V6 from 2014 to 2016, and with the VR30DDTT twin-turbo V6 from 2016 to 2025. HKS developed it as the Skyline 400R muffler in Japan, and its fitment record shows rear-wheel drive, so owners of all-wheel-drive cars should confirm fitment first.
How loud is it compared to the factory exhaust? HKS measured 83 dB on its close test against 79 dB for the factory system, and 59 dB against 55 dB at idle. HKS describes a moderate sound at idle and on a light cruise, with an aggressive deep tone that suits a high-power V6 when the throttle opens.
Does the Q50 need a tune after installing this muffler? No. HKS lists no tune requirement for part 31021-AN012, and the kit includes no engine management. Only the main mufflers change, so the LEGAMAX Sports Exhaust for RV37 can stay on the car as a build develops, whether or not the car is tuned later.
How much ground clearance does it leave? HKS lists 127mm of minimum clearance on stock suspension, with the factory front pipe as the lowest point rather than the HKS mufflers. Owners on lowering springs or coilovers, such as the HKS HIPERMAX S for RV37, should check the gap under the car before regular use.

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 Sports Exhaust for RV37 Infiniti Q50 [31021-AN012]

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HKS LEGAMAX Sports Exhaust for RV37 Infiniti Q50

Features

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Applications

Notes

Frequently Asked Questions

About HKS

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