This is the Novarossi "Super Strong" EFRA 9886 One Piece Tuned Pipe (no manifold). This is the one piece variety and requires an off-road manifold, which attaches to the tuned pipe using three small springs (not included). This pipe is designed for good top end performance, but it also has excellent bottom end performance on most Novarossi based engines. The 41021 is the recommended header for this pipe, and will produce smooth bottom end power that is not lacking in torque, while still producing incredible top end performance.
With the brutal nature of 1/8 off road racing it can be difficult keep any tuned pipe free of damage. A damaged tuned pipe will hurt engine performance and can be costly to repair or replace. The Novarossi "Super Strong" 9886 has been built with thicker material to take the abuse of serious off road racing. A positive side effect of the "Super Strong" pipe, is that it resonates at a different frequency, which makes this pipe quieter than the previous Novarossi 9886.
NOTE: This is only the tuned pipe, and does not include a manifold, manifold gaskets or retaining springs which must be purchased separately. This pipe is made available as a separate item so you can choose either the long or short manifold, depending on whether you want better top or bottom end performance.