Ready to pop and drop in some HP? We offer 17 ways to make more horsepower in your next build, including our brand new Drag / F1 / S3000 Steel Sleeves with the ports cut to 300 HP specs for the 1991 to 2005 Mercury 2.5 Liter 2-Stroke V6 Outboard blocks.
 
We offer 200 to 260HP, and 200 to 280HP, in addition to these 200 - 300HP conversion sleeves. These are available in standard bores and plus sizes in the right OD to fit your current block condition.
 
Please check our chart with our 17 different sleeve options.
 
We also offer Nikasil Plate Aluminum Sleeves, ready for your installation, and diamond hone.
 
1-5 weeks build time depending on current production demand. 
 
Please call Mike Hill at 714-697-1716 with any questions about the right sleeve for your black or gold block.