Up for sale is a brand new set of 8 Coated Pistons with pins. These are 4 ring pistons that are coated, diamond turned, and weight balanced within 2 grams! Please see below for more details and pictures. These are available in several sizes: STD, and .020, .030, .040, .060, .080, .100 and .125 oversizes. Upon purchasing these pistons, please be sure to contact us through messages and let us know which oversize you need.
*After purchasing the item, please contact us to let us knowwhich size(s) you need. You mayadd a noteto your order when checking out, or you maysend us a messagethrough the messaging system specifying the size required. We need this information in order to ship you the correct sized parts for your engine.If wehavenot received this information from you within 7 days, we will understand that you wish tocancel the order, and we will proceed with issuing a refund of your payment.
These will fit the following:
1949-53 Mercury V8 255ci engines
Standard Bore Size: 3 3/16 inches
Piston Type: Precision Cast Aluminum
Compression Ratio:6.8 : 1 or 7.2 : 1 which is to OEM specs with stock heads (will differ when different heads are used)
Compression Height: 1 11/16 inches
Piston Pin Size: .750 inches
***NOTE: Pistons are NOT suitable for racing or engines with Aftermarket Multi-Carburetion***
Control #: PST 991T + oversize
Old Parts Source is excited to announce that many of its popular pistons are now supplied with a high-performance, antifriction coating. Old Parts Source’s coated pistons feature a state-of-the-art coating to extend the life of the engine and eliminate piston scuffing problems. Benefits for classic car hobbyists and high performance enthusiasts include improved piston life, better cylinder sealing, and the elimination of cold start scuffing. The coating is applied in a highly advanced, computer numerical control (CNC) process that leaves no overspray or coating in the piston ring grooves.
A coated piston can be considered as “insurance” against piston problems. Originally implemented in racing, antifriction coating allows the engine builder to take advantage of extremely tight clearances to reduce blow-by and cold-engine piston noise. Cars with a history of overheating, detonation, or scuffing will see an immediate benefit from the coated pistons, and customers will enjoy many years of problem-free operation after installation.
The coated pistons can be installed without modifying wall clearance, and Old Parts Source offers the coating standard on many popular pistons at no extra charge.
Great part at a great price!
Each item is described to the best of our ability. However, we are not perfect and something may slip past us. Therefore, we provide one or more large photographs to add to the description in case we have missed something.
