Valve SpringStocked as an aftermarket replacement, this valve spring serves distribution center maintenance crews looking for a cost-effective swap without compromising on fit. It returns the valve to its seat after the cam lobe releases, replaced during head rebuilds when free length is out of spec or coils are cracked. Keeping pieces like this in stock means a downed truck can get back to moving freight the same shift instead of waiting on a dealer order. Because the cross-reference for AC13209-78200 is to an unrecognized supplier code, contact our team in Whittier with your truck make, model, and serial number to confirm fit before ordering.Aftermarket replacement part, cross-references original part number AC13209-78200.Need help confirming fit? Call (562) 693-7748 with your serial number.Part number variants: AC13209-78200, ac13209-78200, AC1320978200, ac1320978200 ⚠ Warning: Some equipment has serial-number breaks that may not be reflected in the catalog. Contact us for clarification before ordering if uncertain.SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.