Constructed from front to back with 304 stainless steel, the Explorer Series is tougher, more powerful and built to last. With performance as a priority, you will find more horsepower throughout the entire RPM range. Features: • 304 Stainless Steel • Compact Structure • Chambered/Louvered Core Internals • No packing or repacking necessary • Removeable USFS Approved Spark Arrestor • Carbon Fiber sleeved end tip(s) • Laser Cut Big Gun Exhaust Heat Shield