Holley 197-400 GM 4 Pin Alternator Plug Wiring Pigtail;

Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR Sprint Cup team and every NHRA Pro-Stock champion for four decades. Holley's products include performance fuel pumps, fuel injection, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl's, Holley products can give you the edge you need over the competition.