{"product_id":"chevy-big-block-396-427-8-sfi-certifited-harmonic-balancer","title":"Chevy Big Block 396-427 8\" SFI Certified Harmonic Balancer","description":"\u003cp\u003eUpgrade your Chevy Big Block 396-427 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 8.000 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 to dampen crankshaft harmonics, this balancer helps reduce engine wear and improve long-term reliability—especially in performance and high-RPM applications.\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 8.000 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 BIG BLOCK V8\u003cbr\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003eDesigned for Big Block Chevy 396–427 engine platforms.\u003cbr\u003eFits applications with three crankshaft pulley bolt holes.\u003cbr\u003eVerify pulley alignment, timing pointer location, and engine balance before installation.\u003cbr\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\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\u003e8.000 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":49562182844712,"sku":"30004","price":314.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/30004_1600_1_1.jpg?v=1732639817","url":"https:\/\/www.topstreetperformance.com\/products\/chevy-big-block-396-427-8-sfi-certifited-harmonic-balancer","provider":"Top Street Performance","version":"1.0","type":"link"}