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My mechanic worked on those bolts for quite a while before giving up. Eventually he got out his torch and sliced off the corner of the cat flange. If ever I were to re-use the OEM cats for whatever reason, I'd have to have a new flange welded to the header side of the cats.
IDK why it's such a PITA (and it is, no doubt), but if you look at every pic of OEM cats on the G/Z, you'll see one of the three bolts is not actually a bolt, per se.
And 4DRZ... which Nissan/Infiniti product has a transversely mounted VQ37?
Sorry, I was referring to the VQ engine in general which is transversely mounted in the Altima, Maxima, Murano, Quest, and Pathfinder
Originally Posted by ANMVQ
I do 95% of all the work to the car myself also, but without a lift and no torches I wouldn't touch the cats with a 10FT pole.
I don't blame you. It was a royal PITA so I just figured I would do cats w/ headers later.
Originally Posted by 2GoRNot2G
The first time pulling the OEM cats off it took my 3/4" IR impact wrench and all the air my compressor could put out to literally break off the two difficult studs that everyone has trouble with
Ok, so I will definitley wait until I do the cats then.
Originally Posted by chuckie311
Porting the Plenum.. it would be easier to buy HFC or test pipes than to gut them
I like my z1 plenum on mine. That's all I got for you, haven't had the other one. I only went with z1 because it's local to me here in Georgia........no regrets on it power is nice up top but wouldn't mind more mid range power either.
Maybe the logo is a new thing. Mine had it when I got it earlier this year. It is just adhesive holding it on so I am sure you could get the logo if you want for the "bling" factor. I took the engine cover off in hopes that more heat would get out, but the logo does make the intake plenum look a little less generic on its own
I’ll just have to find out after I put in the throttle bodies, it should be obvious if it’s ported right? Look all rough?
Originally Posted by 4DRZ
Maybe the logo is a new thing. Mine had it when I got it earlier this year. It is just adhesive holding it on so I am sure you could get the logo if you want for the "bling" factor. I took the engine cover off in hopes that more heat would get out, but the logo does make the intake plenum look a little less generic on its own
Oh, you are trying to figure out if yours has the Z1 intake plenum? Probably pretty unlikely, especially with Stillen intakes.
But you are right, if you look inside the ports you can tell it has been sanded away. It would not be that tough to do if you were really patient and had a steady hand. They really do not remove that much material.
