Mercruiser Replacement Riser 
$1,196.00
Standard height thru transom or silent choice stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. Comes with 3/4″npt. fitting. (Sold in pairs)
All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for Shift, ECM or EFI, see Merc Replacement Risers or Related Products.