STILLEN Underdrive Performance Lightweight Crank Pulley - Nissan Frontier, Pathfinder, Xterra
Warranty Information
Vendor warranty summary
Stillen Warranty
At a glance: Limited lifetime (max 7 years) on exhaust, intakes, sway bars and urethane; 5 years on TruControl; 1 year on brakes
This is Stillen's warranty, not an NVMOS policy. We've summarized it in plain English to save you a search. The manufacturer's official terms always govern and can change without notice. Last reviewed on nvmos.com: October 4, 2026.
Coverage by product
| Product or component | Coverage |
|---|---|
| Exhaust (stainless) | Limited lifetime while original buyer owns the vehicle (max 7 years) |
| Intakes | Limited lifetime while original buyer owns the vehicle (max 7 years) |
| Sway bars | Limited lifetime while original buyer owns the vehicle (max 7 years) |
| Urethane products | Limited lifetime while original buyer owns the vehicle (max 7 years) |
| TruControl power modules | 5 years |
| Brake pads and rotors (kit components) | 1 year |
- Original purchaser only — coverage does not transfer if you sell it.
- Keep your NVMOS order confirmation — proof of purchase is required.
What's covered
- Manufacturing defects and workmanship when properly installed on the listed vehicle
- Rust-through on stainless exhaust systems
- STILLEN chooses to repair or replace
What's not covered
- Improper installation, modification or misuse
- Racing or commercial use
- Accident or collision damage
- Cosmetic blemishes and finish wear
- Labor, installation, shipping, rental vehicles and consequential damages
- TruControl units that were tampered with or repaired by others
How to make a Stillen warranty claim
- Email STILLEN with photos of the problem
- Include your original invoice/receipt or order info and your contact details
- Keep the original box (and factory parts) for any return
Stillen contact: Phone: (866) 250-5542 · Email: sales@stillen.com · Claim page / support
Bought it from NVMOS? Start with us.
Have your order number and a few photos of the issue ready, then call real humans at (920) 249-7744 or send us a message. We'll tell you whether the claim goes through us or straight to Stillen, and help it along either way.
Shop Stillen at NVMOS
See all Stillen products, lead times and FAQs →
Disclaimer: The information on this page describes Stillen's own warranty policy. It is not a warranty offered by NVMOS (No Visible Means of Support LLC). Manufacturers update their terms at any time; we review these pages periodically, but the manufacturer's current official policy is the one that applies to your claim. Source: Stillen official warranty information. Last updated on nvmos.com: October 4, 2026. See our return policy for NVMOS's own terms.
About the brand
STILLEN is a Costa Mesa, California performance company founded by IMSA GT champion Steve Millen. NVMOS carries the TruPower by STILLEN cold air intake (TP403202) for the 2014–2021 Toyota Tundra 5.7L, with a cleanable oiled filter. It's for Tundra owners who want a bolt-in intake upgrade.
Based in: Costa Mesa, California · Made in: USA · Founded: 1986
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Warranty terms are set by Stillen, not NVMOS, and can change. Bought from us? Call (920) 249-7744 and we'll handle the claim with the brand.
This STILLEN crank pulley does two things at once. It is machined from lightweight aerospace aluminum, so the engine has less mass to spin up than with the heavy OEM pulley. It is also underdriven: STILLEN runs the driven accessories about 10 percent slower, which cuts parasitic drag without making a meaningful dent in how well those accessories work.
The idea is that less power gets spent turning accessories and more reaches the wheels. STILLEN says that adds up to better horsepower, torque and acceleration, and that improved fuel economy is possible. The listing gives no dyno figures, so read those as the vendor's claims, not guarantees.
Fitment
Built for the 4.0 V6 in the Nissan Frontier, Pathfinder, Xterra and Suzuki Equator. The vendor's tags list the Frontier for 2005-2017, the Pathfinder for 2005-2012 and the Xterra for 2005-2008. Not for sale in California.
What's included
The pulley only. The matching Gates belt set is sold separately as part 400385B.
Questions before you order?
Fitment questions are easier to settle before the box ships. Call or text Carl & Anton at (920) 249-7744 or use the chat — real humans in Sheboygan, Wisconsin, not a call center.
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Specifications
STILLEN Underdrive Performance Lightweight Crank Pulley FAQs
What does underdrive mean?
The pulley turns the driven accessories about 10 percent slower than stock, which reduces the power they draw from the engine.
Does it come with a belt?
No. The Gates belt set for this pulley is a separate part, 400385B.
Which engine is it for?
STILLEN describes it for the 4.0 V6 in the Frontier, Pathfinder, Xterra and Suzuki Equator.
Will it improve fuel economy?
STILLEN says improved fuel economy is possible. It gives no measured figure, so results will vary.
Is it legal in California?
STILLEN lists it as not for sale in California.
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