{"product_id":"6-75-sbc-400-harmonic-damper","title":"6.75\" SBC 400 Harmonic Damper","description":"\u003cp\u003eChevy Small Block engines have used three different timing pointer locations. Pre '69 engines have the TDC mark 2° to the left of the keyway centerline. The '69 to '85 dampers have the TDC mark 10° to the left of the keyway centerline. The 1986 to 1991\/1992 have the TDC mark 40° to the left of the keyway centerline. All of our SB Chevy dampers, as well as all other aftermarket dampers, use the 10° TDC position. Our 6.75\" diameter model shave two TDC marks, one that is 10° and one that is 40° to the left of the keyway. If you have a pre '69 vehicle you can use one of the aftermarket bolt-on timing pointers to align correctly with the timing marks on our dampers.\u003c\/p\u003e\n\u003cp\u003eAlthough this model damper features a bolt-in counterweight, the damper cannot be used without the weight. Due to the windows cut in the front face of the damper if the counterweight is removed it is still not a neutral balance damper. If you need a neutral balance 6-3\/4\" damper use #80000 or #90000.\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e","brand":"Professional Products","offers":[{"title":"Default Title","offer_id":46059433820220,"sku":"80001","price":89.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/80001.png?v=1787699096","url":"https:\/\/rpm-racing.com\/products\/6-75-sbc-400-harmonic-damper","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}