AEM 23-800BK Tru-Time Adjustable Cam Gear for Honda D-Series Engines

Vehicle Fitment

• Honda D-Series engines:
• Fits SOHC engines such as D15B7, D16A6, D16Z6 used in 1988-1995 Honda Civic, CRX, and 1993-1995 Del Sol

Features

• Tru-Time adjustable camshaft gear for precise cam timing advance/retard
• Enables +/- timing 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 resists wear on belt contact surface
• Grade-8 six-point hex bolts with integral washer flanges for secure clamping
• Ideal for milled, high-compression, forced induction and performance builds
• Can restore proper cam timing after head milling or performance modifications
• Sold individually - use two for intake & exhaust gears if required

Specifications

• Part number: AEM 23-800BK
• Part type: Tru-Time adjustable camshaft gear
• Material: 6061-T6 billet aluminum
• Finish: Black hard-anodized
• Adjustment: +/- cam timing with laser-etched 1° marks
• Gear bolt pattern: 5-bolt design
• Sold: individually (one gear per purchase)
• Vehicle compatibility: Honda D-Series engines (D15B7, D16A6, D16Z6) - see fitment list
• Legal status: legal on emissions controlled & non-controlled vehicles; not CARB certified for California off-road only.*:contentReference[oaicite:0]{index=0}

Included Components

• 1x AEM Tru-Time adjustable camshaft gear (23-800BK)
• 6x Grade-8 hex cam gear bolts with integral washer flanges
• Installation instruction sheet

Product Description

The AEM 23-800BK Tru-Time Adjustable Cam Gear is a high-precision performance component engineered for Honda *D-Series* SOHC engines such as the **D15B7, D16A6 and D16Z6**, commonly found in late-'80s and early-'90s Civic, CRX and Del Sol models. This adjustable cam gear allows tuners to advance or retard cam timing in fine **1-degree increments** using true laser-etched markings on the gear's leading edge. By optimizing cam timing relative to your engine's current setup - especially useful on heavily modified engines - you can improve torque, horsepower delivery, and overall performance without changing the camshaft itself.

CNC-machined from rugged **6061-T6 billet aluminum** with a **black hard-anodized finish**, the 23-800BK is built to withstand the stresses of performance use. The included Grade-8 bolts provide secure, repeatable adjustments during tuning sessions. Whether you're correcting cam timing after cylinder head machining or tailoring timing for forced induction or high-compression builds, this Tru-Time gear enables precise cam timing control. Sold individually, it fits the standard **5-bolt cam gear pattern** of Honda D-Series engines - with two recommended for complete intake and exhaust timing adjustments as needed.