I have a stock 1275 motor with 3-1 extractors on it.

I have been looking at uk minisport extractors to see what else is out there & ... There's alot.

I'm guessing lcbs would b good... Y piece maybe?? Dunno

What's a good option for my motor as I'll be changing carbies & exhaust pretty soon to 1 3/4" su & 1 3/4 exhaust.

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PrOuDlY aSkInG qUeStIoNs FoR uR aMuEsMeNt

Cooper Matrikon had a Perry 3 into 1 set on Barney's 1293 when bought. He now has an LCB on, and reckons it goes much better.
Motor is not stock- but the cam is pretty mild (Wade 104).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.