These Long Tube Big Block Chevy Headers for 67-69 Camaro and 68-74 Nova are designed for use with a 572 Tall Deck Engine using cylinder heads that use the factory Big Block Chevy bolt pattern.  They also work great when using Raised Port Heads on a Standard Deck Block.  The 2-1/8 Long Tube design promotes excellent torque throughout the RPM range. These are built for use with the factory sub frame. They fit around Manual and Power Steering boxes as well as factory A/C boxes. The 3.50 collectors are welded on for a great leak free seal and an easy connection to your exhaust system if you choose to do so. Comes complete with reducer cones and stainless band clamps to adapt the 3.50 collectors down to 3.00 for exhaust connection. Can be used with Dynatech part number 793-91130 or most other 3.00 exhaust systems. Finished in a High-Temp Black painted finish and optional ceramic coating inside and out for a long lasting durable appearance. 16 gauge steel construction and CNC last cut, surfaced flanges make this a durable header that remains leak free for years to come. Comes standard with a Full One Year Warranty.