Proform Harmonic Balancer Cover - Bow Tie Emblem - 6.75 in. BR10021 These cast aluminum valves covers

These cast aluminum valves covers these may be slightly taller than OEM

There is also a LED indicator on the unit that shows the operator what color the LEDs are set on at that time

Model 4160

and red boots

Exhaust Rotator Eliminator is

Proform Harmonic Balancer Cover - Bow Tie Emblem - 6.75 in. BR10021 These cast aluminum valves coversProform Harmonic Balancer Cover Bow Tie Emblem 141 727 6. 75 in. Black Patented Cover Offers Improved Readability More Stable Top Dead Center Indication Better Timing Accuracy Applications include: Bel Air, Biscayne, Blazer, Blazer K5, Brookwood, C10 Pickup, C10 Suburban, C15 Pickup, C15 Suburban, C15 C1500 Pickup, C15 C1500 Suburban, C1500 Pickup, C1500 Suburban, C20 Pickup, C20 Suburban, C25 Pickup, C25 Suburban, C25 C2500 Pickup, C25 C2500