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Discussion Starter · #1 ·
On a previous car I replaced the standard manifold with a superspring 4-2-1 manifold and it made some impressive gains in terms of torque, top end (slight) and felt like it flowed much better and more revvy. Oh and a sweeter noise.

What can I expect from a mazdaspeed 4-1 manifold on a 1.6 eunos?

I have read that they don't make a great deal of difference on a 1.6 but will I expect anything?

I was a bit dubious of going for a 4-1 as I really liked the 4-2-1 but one came up at a good price.
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