The RPT designation comes from adap

The RPT designation comes from adapting the design from our Race-Pro four-inch muffler into this three-inch size. The bodies begin as three-inches at the front until they expand to three and a half inches at the rear. The black tip is also the Race-Pro machined design that's held in place with 12-point bolts.

結果 (中文) 1:

RPT 指定来自适应从我们种族 Pro 四英寸消声器设计成此三英寸大小。机构开始作为在前面三英寸，直到他们扩大到三个半英寸在后方。黑色的一角也是用 12 点螺栓固定到位的种族 Pro 加工设计。

結果 (中文) 3:

报告名称来自适应的设计从我们的专业赛车四英寸到三英寸大小的消声器。身体开始前三英寸，直到他们扩大到三个半英寸的后方。这个黑色的顶端也是一个有着12点螺栓的设计，即在一个地方举行的比赛。