Exhaust Header Collector Super Competition Merged 12 in. Slip-On Collector Super Competition Merged 12 in. Slip-On Collector; 4 Into 1; Primary Tube Size 2.125 in. OD; Collector Dia. 3.5 in.; Sold In Pairs Only; FEATURES: Joining Primary Tubes No Sharp Edges Reduced Turbulence More Precise Tuning Improves Aerodynamic Flow Made w/Lightest Material Poss. Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro-Stock champion. Holley's products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & 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.

Exhaust Header Collector Super Competition Merged 12 in. Slip-On Collector Super Competition Merged 12 in. Slip-On Collector; 4 Into 1; Primary Tube Size 2.125 in. OD; Collector Dia. 3.5 in.; Sold In Pairs Only; FEATURES: Joining Primary Tubes No Sharp Edges Reduced Turbulence More Precise Tuning Improves Aerodynamic Flow Made w/Lightest Material Poss.