Throttle Body Spacer for Jeep Comanche (1991-1992) 2.5L 4.0L

Precision-Machined Billet Throttle Body Spacer for 1991-1992 Jeep Comanche

Optimized Intake Velocity: Increases manifold plenum volume and conditions airflow downstream of the throttle plate to sharpen off-idle throttle response and low-end torque on AMC powerplants.

The Stock Comanche Intake Restriction

The 1991-1992 High Output (HO) AMC configurations utilize an intake manifold where the throttle body sits abruptly against the plenum entrance. This short runner interface creates boundary-layer turbulence and uneven charge distribution at initial throttle tip-in. Furthermore, rapid heat soak from the cast cylinder head conducts directly into the throttle assembly, thinning intake air density and reducing low-rpm scavenging efficiency.

The Engineering Solution

CNC-machined from aircraft-grade 6061-T6 billet aluminum, this spacer lengthens the intake tract to smooth air transition from the throttle bore into the manifold runners. The specialized internal geometry stabilizes high-velocity airflow, aiding cylinder filling before the intake valve closes. Packaged with corrosion-resistant 304 stainless steel hardware, it guarantees a rigid, leak-free seal that resists thermal degradation and underhood vibrational stress.

Technical Specifications

Compatibility

• 1991-1992 Jeep Comanche (MJ) 2.5L I4 (AMC 150)
• 1991-1992 Jeep Comanche (MJ) 4.0L I6 (AMC 242 High Output)
• Direct fitment for Base, Pioneer, and Eliminator trim packages

The Jeep Trail-Duty Standard

Engineered to handle severe trail washboards and crawl-ratio lugging, this solid-metal intake modification delivers mechanical durability with zero vacuum failure points or recalibration requirements.