{"product_id":"chevy-small-block-400-6-3-4-sfi-certifited-harmonic-balancer","title":"Chevy Small Block 400 6 3\/4\" SFI Certified Harmonic Balancer","description":"\u003cp\u003eUpgrade your Chevy Small Block 400 engines with a SFI-certified performance harmonic balancer designed to control crankshaft vibration and reduce harmful harmonics across the RPM range. Built for street and performance applications, this 6.750 in. balancer improves engine stability, durability, and overall reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVibration Control \u0026amp; Engine Protection\u003c\/strong\u003e\u003cbr\u003eDesigned for Small Block 400 applications, this balancer helps dampen crankshaft harmonics, reduce vibration, and improve long-term engine reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDurable Performance Construction\u003c\/strong\u003e\u003cbr\u003eSteel and elastomer construction provides dependable damping and strength, while SFI certification supports high-performance and racing applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy Timing \u0026amp; Installation\u003c\/strong\u003e\u003cbr\u003e60 deg. Before Top Dead Center To 0 deg. Top Dead Center timing marks simplify ignition setup, while the 6.750 in. diameter supports proper accessory alignment and straightforward installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Applications\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations where crankshaft stability and consistent operation are critical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (400 SBC swapped)\u003cbr\u003eChevrolet Chevelle \/ El Camino (400 SBC equipped or swapped)\u003cbr\u003eChevrolet Nova (400 SBC equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (400 SBC equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (400 SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003eDesigned for externally balanced Gen I Small Block Chevy 400 applications.\u003cbr\u003eFits 400 CID applications with three crankshaft pulley bolt holes.\u003cbr\u003eVerify pulley alignment, timing pointer location, and engine balance before installation.\u003cbr\u003eNot compatible with internally balanced 262–350 SBC, LS, LT, or Big Block Chevy engines.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBolt And Washer Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eElastomer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDamper Color\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDamper Finish\u003c\/td\u003e\n\u003ctd\u003eSatin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDamper Material\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Balance\u003c\/td\u003e\n\u003ctd\u003eInternal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade Type\u003c\/td\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hole Quantity\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside Diameter\u003c\/td\u003e\n\u003ctd\u003e6.750 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulley Groove Quantity\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSFI Rating\u003c\/td\u003e\n\u003ctd\u003eSFI 18.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTiming Marks\u003c\/td\u003e\n\u003ctd\u003e60 deg. Before Top Dead Center To 0 deg. Top Dead Center\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562181861672,"sku":"30001","price":233.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/30001_1600_1_1.jpg?v=1732639798","url":"https:\/\/www.topstreetperformance.com\/products\/chevy-small-block-400-6-3-4-sfi-certifited-harmonic-balancer","provider":"Top Street Performance","version":"1.0","type":"link"}