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480 Bigbore Head Gasket? Can U Use Stock?

4824 Views 9 Replies 8 Participants Last post by  hew
i have a 480 big bore and i want to replace all the top end gaskets will a stock gasket kick work or do i need one for the 98mm head? is there a difference>?
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ya, there is a difference. the bore size is 4mm bigger than stock. so your gasket needs to have its bore diameter sealing surface to be 4mm bigger aswell. get a COMETIC 98mm top engd gasket kit!
What these guys said... plus you can however use the stock base gasket.
QUOTE (02rappy660r @ Feb 6 2010, 09:43 AM) index.php?act=findpost&pid=835872
ya, there is a difference. the bore size is 4mm bigger than stock. so your gasket needs to have its bore diameter sealing surface to be 4mm bigger aswell. get a COMETIC 98mm top engd gasket kit![/b]
Its a +3mm you need not a +4 like the others said.
isorry the bore is a 97mm so +2 so do they make a 97mm gasket or do i need a 98mm?
QUOTE (yfzkid656 @ Feb 6 2010, 04:50 PM) index.php?act=findpost&pid=835959
isorry the bore is a 97mm so +2 so do they make a 97mm gasket or do i need a 98mm?[/b]

you need the 98mm they dont make a 97mm
QUOTE (1fast06yfz @ Feb 6 2010, 04:50 PM) index.php?act=findpost&pid=835984
you need the 98mm they dont make a 97mm[/b]

ok thanks so the 97mm makes it 468cc correct +2 so does that mean stock 06 up is 448?
ya, there is a difference. the bore size is 4mm bigger than stock. so your gasket needs to have its bore diameter sealing surface to be 4mm bigger aswell. get a COMETIC 98mm top engd gasket kit!
Can I use the stock cylinder head for the big bore kit?
when you go big bore it should come with a new cylinder or u can have urs bored out. And for the head yes you could still use the stock one.
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