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Single HS4 vs pair of HS2 on a 1275?

single HIF44 for me, BDL needle, K&N pancake filter. on standard 1275.
Manifold can be a bit of a pig to source. I used a mini one & moddified it by lopping the carb flange off & took about 1/2" wedge out from the bottom & got it welded back together. Otherwise to bonnet won't shut.
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There are lots of posts here regarding single or twin, but single for me is the way to go. Plenty of oooomph & only need to buy parts for one carb. Plus BMC cocked up the design of the twin manifold & there is lots of bad turbulence in there.
 
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