The 4-inch black shift knob extender for a Honda is a common aftermarket accessory designed to provide a more comfortable and precise shifting experience in
manual transmission vehicles. Most Honda and Acura models use a standard M10x1.5 thread pitch. 

Product Details

 Material: Typically made from aluminum alloy or stainless steel.
Length: Approximately 4 inches (10.16 cm).
Color: Black.
Design: The extender may be straight or curved, as specified in your query, with curved options available from various retailers.

 Purpose: It raises the gear shift knob, offering a better arm angle and making shifting smoother, especially in racing applications