Alright i'll try and sum this up fast. Picking up shell, has 2 1/2'' custom exhaust piping all the way back. Guy is throwing in CAT for free and wanted to know if i can just tac it on then run a bead all the way around? I have around 5-6 years of experience in welding and EXTREMELY gifted at it. So messy beads/leaks ect all that is no problem. i just want to know i can can just weld on this cat so i can pass smog.

 

Not just any cat. It has to be vehicle specific. If it's too big (like for a 350 lets say) it won't pass, same if it's too small.


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Obviously the same vehicle lmfao. Nah i'm getting a GTR CAT and going to weld it on. Of course for the same vehicle, my question is can i tack the CAT on then run a bead around to prevent leaks. Or are they clamped on for smog?

 

You can weld it on. I personally prefer to weld it to bungs, so it can be easily removed for upgrades, repairs, and work later on, but that's just preference.

 

Download picture and circle what the bungs are? like i said welding is not an issue with me as long as i know what i need to weld lol.

 

Bungs are fittings (usually with a flange, for exhaust) that can be bolted together.



That thing with the bolts going through it is a bung. If you hard weld your cat on, removing it would involve cutting, then rewelding. If you weld it onto bungs, you can just bolt it in, and then unbolt it when you need to replace it, or when you need to remove it for maintenance reasons.

 

If you go with the b18c5 and are BARing it I would find out if you need a type R cat or not.

 

This will just be a cat for a y8. My B18c is a build that will take awhile. i don't plan on swapping that in until taxes if anything. I'm going to pick up a motor mount(To keep it in the air and work on it) so when i get the swap i can work on it off the ground.

 

Alright i'll definatley do this. It's only temp. for the time being. I already put money down for a Spoon Tail Silencer[Street] exhaust and a brand new cat. I like the sound of it, plus i basically already ordered a 4-2 Spoon header.

 

Make sure the cat is the same for the model year and make...
You'd be surprised how many are the same.
Id weld it the same way shown above.
Dont create another problem with not being able to bolt items on in your exhaust system.

 

Yeah, really all i am doing with this eg coupe is putting a 20k miles y8 in it. Painting it myself(I've been painting for a good amount of time not, obviously not the worlds best but i do pretty good jobs i would say), i have almost brand new black fat fives that i might polish up and throw on matching extended lug nuts(I get then for like 20$) and clean up the interior just to flip it for an ek coupe.