OEM Nismo with Berk HFC. Had OEM Nismo first but it was almost no difference over the stock. Wife said it was almost quieter than stock. The HFC made a difference. It is not loud, silent on the freeway (the road noise is louder and wind noise even louder if you have the top down). It sounds deep around town and pretty quiet in the higher RPMs. No trouble with the police (4 cops living on my street). Good combo but thinking about getting FI with 18" resonator. Anyone has that combo on a roadster?
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Nismo CBE (oem) || Z1 MAF tubes || K&N filters || Berk HFC || UpRev || 306.35whp 261.06ft/lbs
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