Does the LEGAMAX Trail Master Exhaust get in the way of a trailer hitch?

No. The tips exit on the left side of the truck rather than out the back, a layout HKS chose for the Trail Master range so the tailgate stays clear for loading and a trailer hitch can still be fitted.

What is the Trail short tip for?

HKS includes a Trail short tip for driving on rugged off-road terrain. It swaps with the dual titanium tips, so owners can run the titanium pair on the road and the short tip off it. HKS also measured it quieter, at 84 dB against 88 dB for the titanium tips.

How loud is the Trail Master compared to stock?

HKS measured 80 dB for the factory exhaust, 88 dB with the titanium tips and 84 dB with the Trail short tip, and 62, 70 and 65 dB at idle. HKS describes a strong bass tone that grows with the revs, so the truck is clearly louder than stock with either tip.

Does the Tundra gain power with this exhaust?

A little, according to HKS. The larger than stock piping improves exhaust efficiency, and HKS recorded a gain of 3.8hp at maximum output. HKS does not say how its test truck was set up, and it lists no tune requirement for part 31021-BT001.

Will it fit a Tundra that is not a TRD Pro?

Not confirmed. HKS lists the LEGAMAX Trail Master Exhaust, part 31021-BT001, for the XK70 Tundra TRD Pro with the V35A twin-turbo V6 and test fitted it with the 5.5ft bed. HKS has not confirmed other trims, cab styles or bed lengths, so owners should contact Bulletproof Automotive before ordering.

Description

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Description

HKS LEGAMAX Trail Master Exhaust for XK70 Toyota Tundra

HKS’s LEGAMAX Trail Master Exhaust for XK70 Toyota Tundra is a cat-back system for the twin-turbo V35A TRD Pro, built in SUS304 stainless with a pair of laser-engraved 97mm titanium tips that exit on the left side. HKS adds a shorter Trail tip that swaps in for the titanium pair before the truck heads off-road. It suits the TRD Pro owner who tows or loads the bed and wants a deeper V6 note.

Development and Testing

HKS tuned the silencer for a sporty sound the factory exhaust cannot produce, with a bass tone that grows as the revs climb. The larger than stock piping improved exhaust efficiency, and HKS recorded a 3.8hp gain at maximum output with the LEGAMAX Trail Master Exhaust fitted.

Features

Left-side exit that keeps the tailgate clear and leaves room for a trailer hitch
Dual 97mm titanium tips with HKS laser engraving
Trail short tip included, interchangeable with the titanium tips for rugged off-road driving
Larger than stock SUS304 stainless piping

Specifications

Main Pipe Diameter: 60.5mm x 2 to 74.7mm to 60.5mm x 2
Tips: 97mm titanium, two, plus Trail short tip
Main Material: SUS304 stainless steel
Sound Level, Factory System: 80 dB (62 dB at idle)
Sound Level, HKS Titanium Tips: 88 dB (70 dB at idle)
Sound Level, HKS Trail Short Tip: 84 dB (65 dB at idle)
Minimum Road Clearance: 330mm at the main silencer

Applications

Toyota Tundra TRD Pro: XK70 | 2022-present | V35A

Notes

HKS test fitted this system on a TRD Pro Tundra with the 5.5ft bed; other trims, cabs and bed lengths are not confirmed
HKS USA lists 2022 to 2025 and the HKS datasheet lists 2022 on, so 2026 and later owners should confirm first
The 3.8hp gain is an HKS in-house figure, and HKS does not state its test truck setup, so only the gain is quoted
HKS lists 28kg (61.7lb) but does not say whether this is product or packed weight
HKS also offers a Trail Master axle-back for the Tundra as part 31021-BT002

Frequently Asked Questions

Does the LEGAMAX Trail Master Exhaust get in the way of a trailer hitch? No. The tips exit on the left side of the truck rather than out the back, a layout HKS chose for the Trail Master range so the tailgate stays clear for loading and a trailer hitch can still be fitted.
What is the Trail short tip for? HKS includes a Trail short tip for driving on rugged off-road terrain. It swaps with the dual titanium tips, so owners can run the titanium pair on the road and the short tip off it. HKS also measured it quieter, at 84 dB against 88 dB for the titanium tips.
How loud is the Trail Master compared to stock? HKS measured 80 dB for the factory exhaust, 88 dB with the titanium tips and 84 dB with the Trail short tip, and 62, 70 and 65 dB at idle. HKS describes a strong bass tone that grows with the revs, so the truck is clearly louder than stock with either tip.
Does the Tundra gain power with this exhaust? A little, according to HKS. The larger than stock piping improves exhaust efficiency, and HKS recorded a gain of 3.8hp at maximum output. HKS does not say how its test truck was set up, and it lists no tune requirement for part 31021-BT001.
Will it fit a Tundra that is not a TRD Pro? Not confirmed. HKS lists the LEGAMAX Trail Master Exhaust, part 31021-BT001, for the XK70 Tundra TRD Pro with the V35A twin-turbo V6 and test fitted it with the 5.5ft bed. HKS has not confirmed other trims, cab styles or bed lengths, so owners should contact Bulletproof Automotive before ordering.

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 Trail Master Exhaust for XK70 Toyota Tundra [31021-BT001]

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HKS LEGAMAX Trail Master Exhaust for XK70 Toyota Tundra

Development and Testing

Features

Specifications

Applications

Notes

Frequently Asked Questions

About HKS

Reviews