Exhaust silencer dyno testing. Does it effect hp and tune?

We threw this 2015 civic si on the dyno with bolt ons .
First we tuned it with full exhaust no silencer.
Then we threw on the silencer to see how much it effect hp and most importantly, how much did it change the tune?
This is back to back within a few dyno pulls. No tuning was done once silencer was on.
Tuned by #dardantuned

[@beatzzc1t]

These are actually pretty helpful bro 🙏🏾

[@beatzzc1t]

But if he’s full skunk2 I wonder why our numbers are so low. 😩

[@NoNoRc]

Stock downpipe @dardan? Not really for a z7 head. Maybe a little on the low side if it has a downpipe? If your not swapping the head save the money and run a drop in filter & catted rv6 downpipe and make close to the same power with more torque. I know because he tuned mine👌👍

[@anthonyjanelle12]

I mean it’s common sense …
Your restricting the escape flow of the exhaust fumes lol
Still very cool informational video
I knew it would make less power , but I didn’t know it would cause more knock lol
Definitely wouldn’t add one to a Subaru 👀

[@Suerte_Pepe]

This video was awesome . I always new my prelude was slower with the silencer. I made 196whp 161tq H22a no silencer.

[@KevinBesnier]

What's your mod list for achieving that performance?

[@Promisedland_garage]

Great tune from 170 to 205

[@Pamaga.9]

sorry for my english
what mod 170@205?

[@joeyp.2566]

Forget the civic.. how about that Evo. Any videos of his dyno run.?

[@Dardantuned]

Im doing a video on the evo next