Patriot Collector Flanges - (Set of 2) - 3-Bolt 2-1/2" Diameter 42085S Saves you tons of time

Saves you tons of time

The key to making excellent torque and horsepower comes from using the smallest port for a given amount of airflow and then matching the correct port size to the airflow requirements of your application

You can activate one retard for a nitrous stage and another at top end in high gear for more mph and still have another module left over for dual stage nitrous systems

1973-1986 Pontiac Firebird

Patriot Collector Flanges - (Set of 2) - 3-Bolt 2-1/2" Diameter 42085S Saves you tons of timePatriot Exhaust H7259 3 bolt 2 1 2" diameter Collector Flange Kits. Available in a variety of diameters 2 bolt and 3 bolt applications available.; Patriot Exhaust products continue to offer the best value for the dollar of any brand in the industry. This year's product offering presents sixteen new applications for popular muscle cars and trucks including Camaro, Chevelle, Firebird, GTO, Mustang, Fairlane, Dart, Duster as well as many Chevy and Ford