Bought my '04.5 LLY close to 6 months ago, very first things I did was
straight piped the 5" that was on it (dealer install, put the cat back in)
Egr blocker plate,
Lbz mp
Air raid CAI
Used ac condenser cleaner to clean the coolers.
Now the first time I towed (35' Toyhauler, empty)...