Exhaust Silencer Damper Pipe 55-79. 211-251-157B 211251157B Was £18.00 - Now £16.20! inc. VAT (where applicable) Quantity: at £16.20 each Add To Basket Damper Pipe 1200-1600cc 55-79. Correct for all engines using the smaller diameter outlet on the silencer as used as original fitment upto 1976. If it looks like this, then this is the one, the other one is a one piece pipe including the tail.