304 S/S FULL DONUT 3.50 3-1/2 88MM O.D WELDED OUTSIDE Category_BLOW OFF VALVE ACCESSORIES 1x Rear Main seal

1x Rear Main seal

Step retard for nitrous applications plus a boost timing map

30mm Shank Length

95mm Shank Length

5mm filter thread insert supplied with kit

304 S/S FULL DONUT 3.50 3-1/2 88MM O.D WELDED OUTSIDE Category_BLOW OFF VALVE ACCESSORIES 1x Rear Main sealStainless Steel Full Donut 3 1 2" O. D, Outside Weld Only 3. 5 304 S S FULL DONUT 3. 5 O. D WELDED OUTSIDE ONLY Aeroflow Performance range of 304 stainless steel donuts are perfect for custom fabrication, especially where tight bends are required such as exhausts or engine manifolds. Simply cut the shape you want out of the donut, position and weld. These donuts are perfectly formed, so your finished products flow properly, regardless of orientation.