What are some thoughts on Delkevic slip on mufflers?
I know their are a good many who run the  HD Dyna .
I saw a few references to them but just wanted to hear for someone who has one. I see the description reads that no retuning is needed
So dose that mean they may be restrictive.
Just looking for some feed back.

rangeshooter wrote on 02/25/19 at 15:43:27:


A link to what you are talking about always helps.

Most likely they are relying on the fuel injection computer to make corrections......you don't have that luxury.

Price is$234.00-244.00
They say no re jetting needs to be done but recommend a dyno test.

You may want to go back and read the fitment procedure ,where it states that the baffle (which they sell) has to be replaced about every 10,000 miles,  so  damage won't occur to  the inter baffle pipe and outer shell.  My HD Dyna has been in place 4 years ,16.000 miles and I haven't had to look at it .  They can be bought usually for less than $50.00 used, and are heavily chromed and will last many years with no attention, much less the expense and hassle of replacing baffle material. I suspect they use fiberglass (I didn't check) , which means the motor will change tune / get louder,  constantly as it's runs up the miles . It sounds to me to be over priced and under engineered.

Yep.. pointless from a performance perspective.