New to me 03

[CRHardie]

Just traded my 98 12v for an 03. 5 with 73000 miles and an auto Any thing I should Know or be looking for ? What go fast products are the best?

 

[DaveHess]

I have a 2003 555 with the H. O. and have not had any major problems. I replaced the 3. 5" exhaust with 4" from the turbo back with a free flowing muffler and swiss-cheesed the airbox. I put an aFe Pro-Guard 7 factory replacement filter in the airbox. I also went with a Van Aacken 3. 1 box for added power and have been very pleased. I tow a travel trailer and car hauler with mine 8,000 and 5,000 pounds respectively and love how she tows with the VA 3. 1. My gain in MPG was about . 5 but no major decrease from stock so I was pleased. The results from these mods??? On the dyno stock was 253 HP and 499 lb-ft of torque at the rear wheels. With these mods, 296 HP and 643 lb-ft of torque. BTW, I have 34,000 miles on the clock.