Walbro 255
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The summit 255 pump(for the mustang) is the walbro gss307 pump. $107 I just put one in my car. But you may want the gss340 which is still a 255L pump but at a higher pressure.
The gss307 is still good for 70psi the gss340 is rated up to 100psi.
The gss307 is still good for 70psi the gss340 is rated up to 100psi.