![[AP837-R4-S]Porterfield R4-S Perf Street Compound](http://www.dieselfiltersonline.com/cdn/shop/files/137339-0_1.jpg?v=1793574430&width=1616)
![[AP837-R4-S]Porterfield R4-S Perf Street Compound](http://www.dieselfiltersonline.com/cdn/shop/files/137339-0_3.jpg?v=1793574436&width=1616)
![[AP837-R4-S]Porterfield R4-S Perf Street Compound](http://www.dieselfiltersonline.com/cdn/shop/files/137339-0_1_1024x.jpg?v=1793574430)
![[AP837-R4-S]Porterfield R4-S Perf Street Compound](http://www.dieselfiltersonline.com/cdn/shop/files/137339-0_3_1024x.jpg?v=1793574436)
Love Dieselfiltersonline.com, have be using them for years.
Smother and quieter engine , Plus slight fuel consumption improvement , Highly recommend , DM.
Thank you for your feedback, Diesel. We're glad you had a positive experience with our products and service. We truly appreciate your business and look forward to helping you again.
best filters for a fraction of the price
Thank you for your feedback, Sube. We're glad you had a positive experience with our products and service. We truly appreciate your business and look forward to helping you again.
Great filter, nothing better than oem
Thank you for your feedback, rd. We're glad you had a positive experience with our products and service. We truly appreciate your business and look forward to helping you again.
Used in place of a $148 Volvo Penta D4 marine diesel part. The Mann is a direct replacement for the VP filter. The Mann is a great value.
Thank you for your feedback, Big. We're glad you had a positive experience with our products and service. We truly appreciate your business and look forward to helping you again.