{"product_id":"peterbilt-388-tractor-trailer-air-valve-knobs","title":"Peterbilt 388 Tractor \u0026 Trailer Air Valve Knobs","description":"Your \u003cb\u003esemi truck interior\u003c\/b\u003e has never looked so good! Accent your dash with beautiful, high quality chrome plated aluminum knobs. Features a 388 engraving. Knobs will never tarnish, are scratch resistant, and easy to clean. \u003cbr\u003eChoose shape from drop down menu. \u003cbr\u003eSold individually. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eTo Install:\u003c\/b\u003e \u003cli\u003eBefore taking off your plastic knobs, set the yellow and red stickers on your dashboard behind the corresponding valve. \u003c\/li\u003e\u003cli\u003eUnscrew the plastic knobs and install the corresponding chrome knobs onto each valve. \u003c\/li\u003e\u003cli\u003eMake sure the set screw on your chrome knob is not already engaged before starting ignition. \u003c\/li\u003e\u003cli\u003eScrew the button and align the logo the way you want it. \u003c\/li\u003e\u003cli\u003eTighten the set screw with a 3\/32 Allen wrench, not included.\u003c\/li\u003e","brand":"DELPANN DISTINCTION INC","offers":[{"title":"Square \/ Tractor","offer_id":51837670195522,"sku":"292413","price":67.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/2826\/4002\/files\/292644a.jpg?v=1768476234","url":"https:\/\/www.iowa80.com\/products\/peterbilt-388-tractor-trailer-air-valve-knobs","provider":"Iowa 80","version":"1.0","type":"link"}