B&M Shift Improver Kit - GM TH400/475 Transmissions 2001 pontiac firebird All throttle body gaskets should

All throttle body gaskets should be changed when you suspect or there is evidence of a leak

more reliable and will not drop connection

Polyurethane works excellent for street and drag racing applications

These control arms are extended 5/8” but also feature additional adjustment to perfectly center the rear end

boost or water meth

B&M Shift Improver Kit - GM TH400/475 Transmissions 2001 pontiac firebird All throttle body gaskets shouldThe B&M Shift Improver kits feature two options to recalibrating your 1988 1994 GM TH400 and TH475 automatic transmissions. First is the HEAVY DUTY set up, giving you firm positive shifts without loss of driver comfort for improved performance in all street vehicles. This is a great option for performance street driving or towing. The second is our STREET STRIP set up. Be warned, this will deliver firm positive shifts you will feel, along with easily