BGRS 4AGE 16V Underdriving Alternator Pulley
6061 T6 - Anodized Green Race version - 50% Underdrive Sport Version - 25% Underdrive Sport and Race both include oversized alternator belt (required when using a factory-sized crank pulley and water pump pulleys) We noticed a trend for 4AGE's driven hard or at high speed to have issues with alternators failing. Add in some oil from leaky cam and main seals while running hard on track and this is a recipe for disaster (don't ask us how we know). Part of this may be to aftermarket alternators not being made to the same quality as OEM, but another aspect is that these alternators are being spun to a very high RPM, especially with the raised redlines that we are seeing with modified 4AGE's We have 2 versions, the Street and the Race version, which is pictured here. 4AGE 16V Race Alternator Pulley 4AGE 16V Sport Alternator PulleyThe Race version should be used for competition cars only. It reduces the alternator speed by 50%. Th