91-06 Jeep 4.0L TB Spacer

The 91-06 Jeep 4.0L TB Spacer from AIRAID INTAKE SYSTEMS is a throttle body spacer engineered to enhance the intake flow dynamics on 1991–2006 Jeep Cherokee and Wrangler models equipped with the legendary 4.0L inline-6 engine. Mechanics and off-road enthusiasts rely on this 1-inch aluminum spacer to optimize air charge temperature and improve volumetric efficiency during acceleration and sustained climbs. Designed for serious Jeep builders who understand that every fraction of an inch in intake manifold geometry directly influences engine breathing and torque delivery, this throttle body spacer addresses the restriction inherent in stock intake designs.

Fabricated from red anodized aluminum, the spacer features a rigid 1-inch thickness that creates separation between the throttle body and intake manifold, allowing cooler ambient air to enter the engine and reducing intake charge temperature under load. This material choice resists corrosion in harsh off-road conditions while maintaining precision tolerances critical to proper sealing. The kit includes OEM-quality gaskets and stainless hardware, ensuring a leak-free installation that maintains fuel metering accuracy and prevents vacuum leaks that compromise idle quality and drivability. At just 1.1 pounds, the spacer adds negligible weight while delivering measurable gains in airflow dynamics.

Bolt-on installation makes this spacer ideal for stock restorations, mild performance builds, and serious off-road platforms where throttle response and low-to-mid-range torque matter equally. The compact 5.5 x 1.5 x 9.3-inch profile fits within the standard engine bay without requiring hood clearance modifications or exhaust rerouting. Jeep 4.0L owners upgrading intake systems, fuel injectors, or pursuing complementary modifications will find this spacer synergizes well with aftermarket intake manifolds and air filtration upgrades, making it an essential foundation piece for any breathing system optimization on these iconic inline-six platforms.