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1981 GPZ - 550cc
Intake duration 239°
Tips: 45°
Shatter-resistant polycarbonate lenses for impact protection
Bolt-on for OEM calipers and calipers that require OEM style mounts
akrapovic 2 into 1 stainless headpipe for aprilia 3OM 1981 GPZ - 550ccAkrapovic 2 into 1 Stainless Headpipe for Aprilia The Akrapovic 2 into 1 Stainless Headpipe for Aprilia is designed for riders seeking peak performance and weight reduction. Crafted from high grade stainless steel with a larger tube diameter and no catalytic converter, this race focused upgrade is ideal for closed course circuits. With a weight reduction of 2. 9 kg (56. 8% lighter than stock), this headpipe boosts your bikes power by 4. 2 kW (5. 7 hp)