Description These are the finest pushrod tubes we offer. Made by Scat enterprises. These spring loaded tubes are perfect for any 12-1600cc style engine. They adjust to any width engine and with their dual o-ring design, provide the best sealing of any adjust tube on the market. we also offer the Scat Big Mouth large diameter push-rod tubes for long stroke high-lift rocker engines, click here see part number C15-20176 We offer a wide variety of adjustable and spring loaded push rod tubs set from a number of suppliers.Click here to view all options.