Stainless Steel GY6 Exhaust Flange

Stainless Steel Exhaust Flange Built for 150cc GY6 Engines

This stainless steel exhaust flange is made for 150cc GY6 4-stroke engines and gives you a secure joint between the engine and the exhaust. It helps keep the exhaust system working as it should. Swapping out a worn or cracked flange can make a noticeable difference to how the engine runs and sounds. It is one of the essential GY6 scooter parts for keeping the engine breathing correctly, particularly if you plan upgrades that could call for re-jetting.

What This Part Does

The exhaust system has a direct effect on engine output and how well exhaust gases leave the engine. A worn-out flange can disrupt that flow, and replacing it can help the engine breathe properly again. This matters most when you are looking at performance upgrades that may need re-jetting.

Specifications

• Material: Stainless Steel
• Size: Inner Diameter 29mm
• Thickness: 4.6mm
• Bolt Hole Spacing: 50mm
• Fits: GY6 152QMI/157QMJ 125cc/150cc four-stroke, QMB139 49cc/50cc four-stroke, 40QMB 50cc two-stroke

Fitment

Compatible with:

• GY6 152QMI/157QMJ engines (125cc/150cc four-stroke exhaust setups)
• QMB139/139QMB engines (49cc/50cc four-stroke exhaust setups)
• 40QMB engines (50cc two-stroke exhaust setups)
• 50QMF engines (90cc/100cc exhaust setups)

How to choose: Before fitting, confirm that the 50 mm bolt-hole spacing, 29 mm opening, and 4.6 mm flange thickness suit your engine and exhaust.

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