What is the best upgrade for a diesel engine? Home › Forums › Diesel tuning & Issues › What is the best upgrade for a diesel engine? This topic has 1 reply, 1 voice, and was last updated 4 days, 20 hours ago by aluxagr. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts April 8, 2026 at 4:08 pm #164 adminKeymaster April 8, 2026 at 9:59 pm #186 aluxagrParticipant definitely dpf delete first, so the engine can safely increase power and owner can easily accommodate bigger upgrades in the future Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In