K&N 2001-2012 Triumph Bonneville/Thruxton/Scrambler Replacement Air Filter

K&N 2001-2012 Triumph Bonneville Thruxton Scrambler Air Filter

Boost horsepower and acceleration on your 2001–2012 Triumph Bonneville, Thruxton, or Scrambler with the washable, reusable K&N High-Flow Replacement Air Filter.

Upgrade your classic British twin with the K&N Replacement High-Flow Air Filter (Part #TB-9004), specifically engineered to replace the restrictive stock paper air filter on air-cooled Triumph models. Crafted in the USA using multiple layers of oiled, woven cotton gauze media sandwiched between aluminum wire mesh, this oval filter drastically improves airflow to your engine while delivering top-tier filtration.

Designed as a direct drop-in replacement, it fits seamlessly inside your Triumph’s factory airbox without requiring custom modifications. Unlike disposable paper filters that need frequent replacement, the K&N TB-9004 is completely washable and reusable—pre-oiled and ready to ride straight out of the box. It provides a smooth, continuous air supply that helps unlock maximum throttle response, increased torque, and reliable long-term engine protection under diverse riding conditions.

Best Uses

1. Performance Upgrades: Ideal for riders looking to maximize airflow and engine efficiency alongside aftermarket exhaust systems or carburetor/EFI tuning.
2. Daily Commuting & Touring: Perfect for urban or long-distance riders seeking consistent engine protection and improved throttle response.
3. Cost-Conscious Maintenance: Excellent for motorcycle owners who want to eliminate the recurring expense of buying disposable stock air filters.

 Features

1. High-Flow Cotton Gauze Media: Constructed with multiple layers of oiled, pleated cotton gauze reinforced by aluminum wire mesh for maximum airflow and stability.
2. Direct Drop-In OEM Fit: Custom engineered with an application-specific sealing bead to drop directly into the stock airbox without modification.
3. Washable & Reusable: Designed to be cleaned and re-oiled repeatedly using a K&N filter care kit, lasting the lifetime of your motorcycle.
4. Pre-Oiled Construction: Factory-treated with specialized filter oil, allowing for immediate installation straight out of the box.
5. Precision Oval Molded Frame: Built to tight tolerances for 2001–2012 Triumph twins to ensure a tight, leak-free seal around the airbox perimeter.

Benefits

1. Increased Horsepower & Acceleration: Reduces air restriction to help the engine breathe easier, yielding noticeable improvements in throttle response and mid-range torque.
2. Long-Term Cost Savings: Eliminates the need to repeatedly purchase OEM paper filters—pay once and reuse for the life of your bike.
3. Superior Engine Protection: Traps harmful dirt, dust, and microscopic debris while preserving high airflow rates to safeguard internal engine components.
4. Extended Service Intervals: Deeply pleated design provides a large surface area, allowing up to 50,000 miles of highway driving before cleaning is required (depending on riding conditions).
5. Eco-Friendly Choice: Significantly reduces landfill waste by replacing single-use disposable paper filters with a durable, long-lasting component.

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