Overview Reviews Product Description M35, 2 1/2 Ton Truck Primary Fuel Filter: New, reproduction. Made in the USA by Luber-finer filters. 261F. S-F350 2 1/2 -5 Ton M35A2 & M54A2 Models Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × 2 1/2 Ton Primary Fuel Filter 261F Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments