Longacre SMI Tach Black Tach 4.5 in w/Black Panel Transmission Cooler with Fan 1991-2003 Buick Park Avenue

1991-2003 Buick Park Avenue

Body Brace End

1 1/4-inch DOM Steel

Fuel InjectionSince 1938

Longacre SMI Tach Black Tach 4.5 in w/Black Panel Transmission Cooler with Fan 1991-2003 Buick Park AvenueSMi? Stepper motor techometers use a small electric motor to drive the pointer. It is more precise than the more common 'aircore' instruments whose accuracy can be affected by the windings. Many professional race teams NASCAR?, etc. are switching to this style of tach for the improved accuracy and response (see the in car TV cameras). Longacre is an established brand name in the racing industry and is recognized for dedication to quality, innovation