PQY Throttle Body Spacer for Jeep 2.5L & 4.0L — 1" Red Aluminum, Improves Low‑Mid Torque

PQY's red 1" aluminum throttle body spacer fits 4-bolt throttle bodies on Jeep 2.5L and 4.0L engines to improve off-idle airflow and intake charge density.

This billet-aluminum spacer is engineered for Jeep models including Wrangler TJ (1997–2006), Wrangler Unlimited (2004–2006), YJ (1987–1995), Cherokee XJ (1984–2001) and MJ Comanche (1986–1993) that use 4-bolt throttle bodies on 2.5L or 4.0L gas engines. The kit ships with two gaskets, three alignment spacers and seven bolts plus small washers for a complete throttle-body-to-manifold installation. Finished in red, the part is 1-inch thick and designed to alter incoming air flow characteristics around 800–3,000 rpm where drivability gains are frequently experienced.

How does adding a 1" spacer change engine behavior at common driving speeds?

The PQY spacer increases the volume and straightness of the incoming air column, which can smooth throttle response and bolster low- to mid-range torque. Drivers often notice a livelier feel between idle and highway merge speeds without modifying the fuel system.

• Targets off-idle to ~3,000 rpm torque improvements
• 1" thickness increases intake charge density
• Works without changing injectors or ECU mapping
• Designed for 4-bolt throttle bodies only

Will this spacer fit my Jeep model and engine?

This kit is compatible only with Jeep 2.5L and 4.0L gasoline engines that use a 4-bolt throttle body flange. It supports the listed TJ, YJ, XJ and MJ model years, in both 2WD and 4WD variants where specified.

• Fits Jeep TJ Wrangler 1997–2006 (4WD)
• Fits TJ Wrangler Unlimited 2004–2006 (4WD)
• Fits YJ Wrangler 1987–1995 (4WD)
• Fits XJ Cherokee 1984–2001 and MJ Comanche 1986–1993 (where 4-bolt throttle body present)

What hardware and components are included in the kit?

The package contains all the mechanical parts needed between the throttle body and intake manifold: the red anodized aluminum spacer plus gaskets, alignment spacers and bolts. Note: no printed installation instructions are supplied, so keep basic hand tools and a service manual or online guide handy if you need step-by-step directions.

• 1x red aluminum throttle body spacer (1" thick)
• 2x intake gaskets to seal spacer to manifold and throttle body
• 3x alignment spacers to maintain proper spacing geometry
• 7x bolts with small washers for secure fastening

How difficult is installation and what should I prepare?

Installation is a straightforward bolt-on job for someone comfortable with basic engine work, but the kit does not include instructions. Prepare standard hand tools, torque specs from a service manual, and a clean work area to avoid debris entering the intake.

• Requires removal of throttle body from intake manifold
• Recommend service manual torque settings and cleaning rags
• Expect minimal vehicle downtime—typically under an hour for experienced DIYers
• No ECU tuning is required for basic fitment

Who is this for: This PQY 1" throttle body spacer is aimed at Jeep owners with 2.5L or 4.0L engines and 4-bolt throttle bodies who want a simple, reversible modification to improve low- and mid-range throttle response and intake charge behavior. It's suitable for DIY mechanics and enthusiasts who prefer bolt-on upgrades without changing fuel system components. If your Jeep model and throttle-body bolt pattern match the kit specifications, this spacer provides a low-effort way to refine drivability while adding a red, anodized visual accent under the hood.