Thunderheader has released there slips ons for the M8. My local Indy called them yesterday and they have them in stock. Just ordered a set. Will let you guys know how they sound and perform once I get them on. I'm currently running the tab slip ons which sound awesome but I've always been a fan of thunderheader. I asked about the 2 into 1 systems and my Indy told me they told them they will be holding out for a while on releasing them due to the warranty issues. If I really like them I'll be putting up my TAB slips ons for sale if anyone is interested. I'll try to post a sound clip once installed.

 

Here are the Thunderheader slip ons on the M8 they sound really good. I'll post a clip when I get a chance.

 

How do they sound? Looks like the right side heat shield needs to be tightened. Maybe it's just a illusion by the photo. Can you post of a sound clip do you like the sound better than your tabs?

 

I uploaded a sound clip of the new Thunderheaders.
I can't get the link to to upload so go to YouTube and it's under Thunderheader slip ons and titled Thunderheader slip ons 2017 Harley. Also when you watch the video it's 22 degrees outside so it's condensation coming out of the exhaust not blue smoke.

 

just found this on youtube.

 

Thats the one I uploaded of the thunderheaders I installed. Thanks for uploading it jclax01.

 

I just don't get the Thunder anything.

 

What is the part number for these? Cant find them on the internet. Thanks.

 

I know this is a slip on thread but what seat is that? The white stitching looks good.

 

What did you do with the TAB Slip ons?