The Mugen valve spring set is designed to cope with increased engine speed following ECU changes and to aid in the use of higher lift camshafts. Recommended for any use over 8,000 rpm. Perfect for use with OEM Honda camshafts and aftermarket camshafts. Combine these with Buddy Club titanium retainers for an excellent combo! For use with DOHC VTEC engines only. Contact us to special order.
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