Peco BB4 Backbox

CVH and Zetec tuning, suspension and braking mods.
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Peco BB4 Backbox

Postby Smuggl0r on Wed Jan 19, 2005 4:09 pm

Hi,
I got a Peco BB4 backbox for quite cheap off a mate, from his 1.1 fiesta. The thing is i tried it on my 1.6 EFI fiesta, and my exhaust bore is bigger than the backbox. Is there anything i can do to make it fit, i've heard of making the backbox pipe that connects to the exhaust pipe slightly bigger, but wont that create a bit of pressure, which is not necessarily good? If not, looks like i'm gonna have to sell it.
Thanks
Smuggl0r :D
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Postby Captain Tightpants on Wed Jan 19, 2005 4:32 pm

Not worth it mate,

It will cause a restriction on your current exhaust, and you may find you lose power.

Sell the thing, and buy a SS system!

Steve
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Postby sexyrs on Wed Jan 19, 2005 4:41 pm

hi just get the old back box and cut off the sleave and about 2-3 in of pipe and just slot it over the peco pipe and put a bit of exhaust paste to make it air tight. me and a mate done it on hes xr2i 8v and it was fine and passed the mot!! :D
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