AEM 23-801BK Tru-Time Adjustable Cam Gear for 1993-2001 Honda Prelude H22

Vehicle Fitment

• 1993-1996 Honda Prelude (H22A1 2.2L DOHC VTEC)
• 1997-2001 Honda Prelude (H22A4 2.2L DOHC VTEC / Type SH)

Features

• Tru-Time adjustable camshaft gear for precision cam timing advance/retard
• Adjustments in 1-degree increments via laser-etched timing marks
• CNC-machined from 6061-T6 billet aluminum for strength and durability
• Black hard-anodized finish for long-lasting wear resistance
• Grade-8 six-point hex bolts with integral washer flanges for secure clamping
• Ideal for milled heads, forced induction, high compression or aftermarket cams
• Precision gear teeth minimize belt wear during adjustments
• Direct OEM-style bolt pattern for precise fitment on H22 engines

Specifications

• Part number: AEM 23-801BK
• Application: Adjustable camshaft gear
• Compatible engines: Honda H22A1 & H22A4 2.2L DOHC
• Fitment years: 1993-2001 Honda Prelude
• Adjustment increments: ± in 1° steps
• Material: 6061-T6 billet aluminum
• Finish: Black hard-anodized
• Weight: ~0.87 lb
• Sold individually; dual cam engines require two gears for full adjustability
• Legal status: legal for sale and use on emissions-controlled vehicles (does not affect emissions)
• Warranty: Manufacturer's limited warranty (typically 1 year)

Included Components

• 1x AEM Tru-Time adjustable camshaft gear (23-801BK)
• 6x Grade-8 hex cam gear bolts with integral washer flanges
• Installation instructions

Product Description

The AEM 23-801BK Tru-Time Adjustable Cam Gear is a precision cam timing component engineered for **1993-2001 Honda Prelude** applications equipped with the **H22A1 and H22A4 2.2 L DOHC VTEC engines**. This adjustable gear allows tuners and builders to fine-tune cam timing - advancing or retarding in precise **1-degree increments** - to better match the engine's actual build, especially useful when cylinder heads have been milled or when using high-performance aftermarket camshafts.

Constructed from **6061-T6 billet aluminum** with a hard-anodized finish on the belt contact surface, the 23-801BK delivers durable performance under racing and tuning conditions. The included Grade-8 hardware and laser-etched timing marks make accurate cam timing adjustments straightforward. Sold individually, this cam gear fits the **5-bolt pattern** used on Honda's H22 engines - and for full intake and exhaust cam adjustment on a dual-cam Prelude, two identical gears are typically used. It's a popular upgrade for pre-'90s and early-2000s Prelude enthusiasts seeking optimized timing for boosted, high-compression, or head-modified engine builds.