Collector Tethers™ Manifold Tethers come individual. By ordering (1) you will receive one intake restraint assembly. Additional tethers and brackets may be purchased depending on your needs.
NHRA will require Intake Restraints for 2015 in the Pro Mod Class on engines which are nitrous assisted and have a bolt on intake manifold top. There are 3 accepted processes for restraining the tops of the plenum.
1 - (2) restraints are required when attaching from the (i.e. manifold bolt) and going directly to a (i.e. carburetor stud)
2 - (1) restraint is required when attaching from a carburetor stud, wrapping around the manifold plenum and top, then back to another carburetor stud.
3 - (1) restraint is required when attaching from a manifold bolt, wrapping around the manifold plenum and top, then back to another manifold bolt.
By using our NHRA Accepted Intake Manifold Tethers you can help prevent costly damage of you intake manifold, hood and scoop. The picutre below is from a racer "NOT" using a restaint system.