Intake

Why the Intake System Matters

The intake system is the first link in your engine's performance chain. Before combustion can happen, your engine needs a steady, clean supply of air — and the components that deliver it have a direct impact on power output, throttle response, fuel efficiency, and long-term engine health. Whether you're chasing peak horsepower on a race bike, keeping a daily-driver running cleanly, or protecting a dirt machine from the harshest off-road conditions, upgrading or maintaining your intake system is one of the highest-value modifications you can make.

At its most fundamental level, every intake system does the same job: draw in as much clean air as possible and deliver it efficiently to the combustion chamber. But the difference between a restrictive stock setup and a well-engineered performance intake can be significant — translating directly to stronger acceleration, improved throttle response, and more complete combustion. The two core components covered in this category are air filters and engine intake manifolds, each playing a distinct and essential role.

Air Filters: The Guardian of Your Engine

The air filter sits at the front of the intake path, tasked with blocking dust, dirt, sand, and debris before they can reach your pistons and cylinder walls. A clogged or insufficient filter robs your engine of airflow; a missing or failed filter can cause catastrophic internal damage. Performance air filters are engineered to balance maximum filtration efficiency with minimal airflow restriction — and the best designs do both simultaneously.

Intake Manifolds: Efficiency in Every Path

The engine intake manifold routes air — or air and fuel — from the throttle body or carburetor into the engine's cylinders. A well-designed performance manifold improves port velocity, reduces turbulence, and ensures an even air charge reaches each cylinder. Upgrades like CNC-ported manifolds are particularly popular for engines that have already received camshaft or cylinder head work, as the manifold can otherwise become a bottleneck.

Top Intake Brands

The intake category brings together some of the most respected names in powersports performance. S&S Cycle is a cornerstone of V-Twin performance, with decades of experience building intake systems, air cleaners, and manifolds specifically for Harley-Davidson platforms. Their engineering philosophy treats intake upgrades as the essential first step in any performance build — improving airflow to release power the engine already has.

For off-road and motocross riders, Twin Air has been the filter of choice for world champions since introducing their landmark dual-stage foam design in 1972. Their filters are trusted by factory race teams globally and are OEM-specified by more than 30 motorcycle manufacturers worldwide. Complementing Twin Air's filters, Outerwears specializes in pre-filter covers and protective wraps that deflect large debris before it ever reaches the main filter element — extending service intervals and protecting performance in the toughest environments.

For Harley-Davidson riders who want style to match their performance gains, Arlen Ness offers intake kits that blend custom billet aesthetics with genuine airflow improvements, making them a popular choice for show-quality builds that still perform on the road. Rounding out the lineup, Injen brings its cold air and short ram intake expertise to a wide range of applications, with systems engineered for measurable gains in horsepower and throttle response.

What to Consider When Shopping Intake Parts

• Application fit: Intake components are highly vehicle-specific. Always verify compatibility with your make, model, and year before purchasing.
• Riding or driving environment: Dusty, sandy, or muddy conditions demand higher filtration ratings and may benefit from pre-filter covers or more frequent maintenance intervals.
• System synergy: Intake upgrades deliver the best results when paired with supporting modifications — exhaust, tuning, and fueling adjustments often unlock the full benefit of an improved intake.
• Washable vs. disposable filters: Reusable performance filters offer long-term cost savings, but require periodic cleaning and re-oiling to maintain their effectiveness.