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Its design removes the pre-stock muffler where the catalytic converter is located allowing less restricted gas flow to aid performance in the mid and high rev range
Seams are hand pounded after stamping process for that factory look
No drilling is required to mount this heavy-gauge
Sound Insert with Spark Arrestor DB @ 5000 RPM 98
IN STOCK Graves motorsports Kawasaki Ninja 400 + Z400 + Ninja 500 + Z500 Velocity Stacks ABK-EX4-VE Relay Its design removes the pre-stockGraves Motorsports Kawasaki Ninja 400 Z400 Ninja 500 Z500 Velocity Stack Kit. Developed through our in house race programs. These stacks create a 6% power increase for $129. 95 no tuning required! 1st & 2nd Charts show a completely stock bike compared to a bike equipped with the Graves' velocity stacks, WORKS2 full exhaust, DNA air filter and Graves FTEcu flash 3rd Dyno chart displays a completely stock bike with and without the velocity stacks no
US$ 117.00
US$ 11.95
US$ 89.95
US$ 16190.00
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