anyone know what size these are?
Im going to be replacing my stock Y pipe with a borla Y pipe and i think i am going to break couple of these bolts, so i know i need to pick up new ones.
Any reccomendations when i am unbolting the old ones so i dont break them in the manifold??

 

Can anyone help me out with this? i need to know before i break some of these installing a new ypipe...im sure those who has done headers could help if they still have these laying around...
Thanks

 

I dont know the size,sorry.If they come loose without breaking,keep working it loosen-tighten.Also use a lot of penetrating oil.

 

k, thanks for the tip..im just tryin to get the size so i can buy these before i even start unbolting the old pipe so im not stranded, its kinda hard to measure these while they are still on the car
Anyone?? Shoebox??

 

Agreed, PB Blaster is your friend...

 

yea yea, i kno that already ...i just need to know the size of these damn bolts

 

Once you get one out, just take it down to Lowe's and match it up.

 

Good idea, if you have a 2nd car

 

They are actually studs. They are m10x1.5x65mm total length, but there is a section in the middle that is not threaded so that it will tighten into the manifold flange. Best bet is go to the dealer and order them.

 

Yea you'll most likely break those, every single one of mine broke except one or two and i used pb blaster.

 

Headers probably 3/8-16X 1"
Y-Pipe to header gaskets probably 3/8-16X 1 1/2 "

 

My bad: thought you were adding headers. I guess they ARE studs. As was mentioned, just get'm at the dealer or NAPA, etal.

 

I replaced mine with bolts.

 

now say i do break a bolt/stud/...is it hard to pull them out of the manifold when they break like in the picture below?, once the y pipe has been disconnected
The arrow is pointing to the bolt

 

If the stud is broken the manifold will need to come off. In that case, take it to a machine shop and they'll fix you up.