Hello to all, I'm new here. (my first posting)
My name is Michael and I just picked up a 2004 Road King Custom. The bike is totally stock with only 480 miles. I've been riding a 1200 custom sportster.
I want to modify the baffels in my stock pipes, but I didnt want to reinvent the wheel. If there is some information here that would help me do this, I would much appreciate it.
My bike is carburated so I dont have to worry about any programing, but I will add the screaming airfilter at the time of the modification. So, if there is any recommendations of the proper jet sizes, I would much appreciate that too.
If anybody has any diagrams of the internals of the stock mufflers. That would also help.
One more thing, if you know anybody who wants to pick up a very nice black 1200 custom sportster, send them my way....

thanks again,
Michael

 

Congratulations on your RK. I did this mod to my stock pipes and am very pleased with the results. There are (2) solid plugs in each pipe, one towards the back and one towards the front. I used a 1-1/4" bi-metal hole saw with a 12" extension and drilled them both out in each pipe. You don't even have to take the mufflers off to do this. By doing this, they are effectively straight-thru pipes. However, they don't sound like drag pipes because there is still insulation and a perforated liner in the chamber. They are somewhat quiet with a deep sound at idle and cruising speeds (but much louder than stock). They start to bark and get loud when you crack the throttle. I'm satisfied with them and plan on keeping them this way (I like the way the stock pipes look). I would recommend trying this first. If you don't like it, you can always buy other pipes but this is free. I just had the high flow air filter and the 95" big bore done with ECM calibration but no cam work. 78 h.p. and 85 ft. lbs with the modified stock pipes. Dealer said that pipes were equivalent to SE slip-ons in terms of performance.

 

Welcome from New Jersey Mike - Glad to have you here - There is a ton of options you have plus Stan gave you a great tip - Be sure to search the Exhaust section, the DIY sections and anything else you can - You will see a lot of info here and for sure the Reinhart guys are gonna chime in at some point - Personal preference is gonna come into play for your choice

 

Thanks Kess and SGU
I didnt know there was a exhaust section, but I"ll look for it.
Now I just need to find the recommended jets for the screaming eagle filter and pipes. That should take of it....
Im use to loud pipes, the hard krome pipes on my sportster just sounded so good.... just dont want to too much more money in this bike right now.... have two little boys to take care of...

thanks again

Michael