Overview Reviews Product Description uper Stock 1555 Sprint Car Race Muffler Case Size: 4" x 8.5" x 12" 3.5" Round Side Inlet, 3.5" Round Side Outlet Inline Aluminized Steel Race Car Drive Dave Blaney, the first to run a SpinTech Muffler in the World of Outlaws! Thank you Dave! Product Videos Custom Field Product Reviews Write a Review Write a Review × 1555 Super Stock Race Muffler Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *