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I ran glasspack header mufflers only on my '74 Cougar XR-7 w 351 Cleveland and it was absolutely obnoxious for a daily. Can't imagine those.

I used Cerakote on the hotside of my turbo on my jet boat. The hotside gets extremely hot. It holds up very well. Proper prep n follow instructions.

I've got a 383/496 stroker w 2-1/8" stepped TTI headers, 3" exhaust w H-pipe. Crank hp/tq is 610/670. It is not loud at all. New video by john wilson

I do not know the standard mufflers that come w the TTI 3" full exhaust, but on my 496" w H pipe, it is quiet and I have no drone at all. Could have to do w me having H as apposed to X and 3" compared to 2.5". But I like my mufflers.

I used it on my TTI headers. I really liked the raw steel look next to the painted engine so I had them done in a silver that was very close. For me w cast iron exhaust manifolds next to Hemi orange, I'd go w a gray that's as close to the cast color as possible.

Muffler shop and have H-pipe made that clears the Gearvendor better than the TTI. It's about $10 US in pipe n very little labor.

My TTI's on my big block w a stock ride height, scrape speed bumps sometimes. I have to go "Very" slow over them.

My 383/496 w 610hp/670tq runs the TTI 2-1/8" stepped headers. No loss of bottom end at all. Scares me if I'm not careful. Issue is clearance, they are tight.

2.5 is the "Absolute" largest for even the most hotrodded 318. 2" maybe 2-1/4" and H pipe in the TTI and you will have all the flow you ever need, no drone and easy clearance.

Do you still have your original exhaust? If so, a quality exhaust shop can cut it just below the flange and fab up a new one.

Online on Google search. Tons of them.

It was very dark under my car, I measured the existing hanger and then held TTI hanger in spot and used it as it's own template.

Kinda like a garbage can on the tailpipe of diesel, makes it louder n go "boom"

I run 3" w H-pipe n headers on my 496 w 610 crank hp, but I never turn more than 5,500 rpm. Way too much. 2-1/2" would have been more than enough.

I've got a '67 Coronet stroke 496 w TTI headers n 3" H pipe exhaust. I'm right at 600 hp. Super tight at gas tank. Rubber mallet work to the gas tank flanges. Took 5 hrs by myself w car over 1-1/2 feet up on Jack stands. Total PITA!!

Thank you for the recommendation. I had actually thought of using header glasspacks then to the mufflers before thinking about catalytics, but resonators would probably be very good too.

Thank you both for your replies. As for the exhaust, anything else I can do or not do? This car will have GV overdrive, Already have it, FiTech fuel injection already have it. It will "NEVER" see the drag strip. This was my great grandmothers car and I just really enjoy torque. It will be driven...

The Trick Flows are 1k each and still require at least a valve job. Possibly more porting to match up to the porting being done on the Stealth heads.

I'm thinking catalytic converters to keep smell down and to help keep highway drone down. Is there a reason you don't think they are necessary other than emissions laws? Actually the cam I'm using is the XR 280HR roller cam. Should be very good bottom end in a 496. But thank you. Already have...

I am building a 383 stroked to 496. It should be in the 650hp range and even more torque. All hp in by 5,200 rpm. Following this build, https://www.hotrod.com/articles/chrysler-383-big-block-mopar-for-the-masses/ , but 496 instead of 450 and roller cam. I am going to use TTI 2" stepped to 2-1/8"...