I have searched and found mixed results on this so here goes.
Do Extractors make much of a difference on a standard l20b ( with a 32/36 weber ) ?
I have two exhaust systems to decide from to put on my bluebird. One is 2.25 from the factory headers and the other is 2 inch with Extractors .
which one should I use?
Option 1 is the easiest swap .

L 20b headers are ment to be good for 170 hp so Iv read probably the safest bet as for pipe size Iv seen in how to hot rod your datsun recommends 2.25 for 4 cylinder l siers

I have searched and found mixed results on this so here goes.
Do Extractors make much of a difference on a standard l20b ( with a 32/36 weber ) ?



NO I like the stock L16(510/1600) exhaust manifold with the Y pipe. stong dont warp. Find one and get it ceramic caoted and will last forever. They just heavy. I believe Baz said they good up to 150hp anyways.

2inch should be fine in my opinion