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Discussion Starter · #1 ·
one thing i noticed is that the stock header has a crossover
tube connecting the three tubes .

the zard is just three straight tubes

i have it on unreliable information that a crossover reduces back pressure at the exhaust valve , there by in creasing torque in the low range .

so would it help the zard to have a crossover .

i still have to get a good tune in it first

really rich on the low end right now
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