Blasphemy, add a catalytic converter??????

[PlayingWithTBI]

I might try to get a slip fit cat just to see if it lessens the rich smell

Try this little guy see what it does for ya, cheap and easy.

https://www.amazon.com/Thunderbolt-...987&sprefix=Thunderbolt+3+cat,aps,1417&sr=8-1

 

[What?]

Sorry should have stated what I have.
Close to stock 454 GenV ( sounds to have a small cam) done by previous owner ??
Edelbrock TBI intake manifold
Edlbrock shorty headers
3" single exhaust to the back with Flowmaster 40

I might try to get a slip fit cat just to see if it lessens the rich smell, Ive got an alarm right above where it parks and it goes off almost instantly when I start it

If the alarm isn't wired. You can relocate the alarm.

Cat will help though.