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Air Flow Research
Upgrade Spring #8017 to #8023 (Includes Valve Upgrade & Cutting Spring Pads for Larger O.D. Spring): SET
Price: $252.63 -
Air Flow Research
Upgrade spring #8031 to #8014 PAC Triple Spring - Only for BBC 357cc, 377cc & 385cc heads (all other heads use upgrade #8038): SET
Price: $207.29 -
Air Flow Research
Upgrade Spring #8031 to #8014 PAC Triple Spring Includes Titanium Retainers and Valve Seal: SET
Price: $421.05