Davis Unified Ignition Rev Limiter - Works w/ All Davis Unified Ignition Distributors HALCL19XXL you may choose between conventional

you may choose between conventional hex style or the space-saving12-point nuts

Infiniti / Nissan 2001-18

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ICON offers the most diverse and fully-featured “Off the Shelf” forged piston on the market today

Mopar B / RB-Series 1958-79

Davis Unified Ignition Rev Limiter - Works w/ All Davis Unified Ignition Distributors HALCL19XXL you may choose between conventionalD. U. I. Rev Limiter Compatible with All DUI HEI Distributors Includes 3000, 6000, 7000 and 8000 RPM Rev Limiting Chips Protect your engine from over revving with the DUI Rev Limiter. The D. U. I. Rev Limiter drops one cylinder at a time very smoothly. This prevents fuel from loading up on the plugs. This also avoids backfires and engine damage. Set your RPM limit with plug in modules. a 6000, 7000 and 8000 RPM module is included with the rev limiter.