67-81 Camaro, 68-87 Chevelle, 68-79 Nova. 70-87 Monte Carlo, 71-91 Mid Length Size. 78-87 Olds Cutlass&442: 283-400. Primary Tube Size 1.5″, Collector Size 2.5″. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Exhaust & Emission Systems\Manifolds & Headers”. The seller is “riderightparts” and is located in this country: US. …