BBK Phenolic Intake Plenum Spacer - 3/8 in Thick - Small Block Ford - Ford Mustang 1986-93 R0400022XL simply turn the adjustment knob

simply turn the adjustment knob to the desired idle setting

20 in Extended

8-1/2" x 2"

Volvo 5-Cylinder

BBK Phenolic Intake Plenum Spacer - 3/8 in Thick - Small Block Ford - Ford Mustang 1986-93 R0400022XL simply turn the adjustment knobBBK IS YOUR NUMBER ONE AFTERMARKET PERFORMANCE BRAND IN THE USA AMERICAN DESIGNED AND BUILT; NON HEAT TRANSFERING PHENOLIC MATERIAL REDUCES UPPER INTAKE MANIFOLD TEMEPRATURES FOR REDUCED AIR INTAKE TEMPERATURES; COOLER INTAKE TEMPERATURES ALLOW DENSER AIR FOR IMPROVED PERFORMANCE; OFFERS INCREASED VALVE COVER CLEARANCE FOR LARGER ROCKERS AND VALVE COVERS; EASY TO INSTALL INCLUDES NEW LONGER HARDWARE AND 2 NEW GASKETS 1986 1993 MUSTANG 5. 0 PHENOLIC