Replacement Electronic Exhaust Valve Spring Valvetronic Designs Sale! from 1599 0 /per Spring style A (small circular) B (large circular) C (small flat) D (Large Flat OEM BMW) E (High Tension Circular) F (OEM Mercedes, Mustang, Corvette etc) Qty. Add to Cart This item is either made to order or has limited inventory. Please reach out to confirm lead times if needed. Replacement valve spring for our exhaust systems. *SOLD INDIVIDUALLY*