What do you guys think of these thunder torque inserts? Will I have to get a tune after pulling the baffle and cat out?

 

They're more or less like the lollipop guys have been using for years, an aid to help a drag pipe or poorly designed exhaust gain some of its low end torque back. After pulling the baffle and cat out , you'll defiantly need to tune it.

 

Yup.
Back in the day of the Samson Rip-Saws, Groundpounders, White Bros. Poker Pipes etc, etc etc, we used to manufacture 6061-T6 aluminum "Torque Nozzles" that were installed near the end of those giant 2 1/4" pipes.
They had a 10* taper, and a dedicated thru hole dimension(that could be machined at the time of dyno tuning).
Really helped those rediculous "power killers" that would haved served better purpose under someones kitchen sink.
Scott

 

They work pretty well in my Big Shots Long. Nice idle, pretty quiet at cruise, and loud when you get on it.

 

Thanks guys.