If they sell just the modified manifold, I would be willing to do a direct comparo to the m370. Andrew, you ever get new tires and your car onto a dyno? You're pretty close to this setup minus their manifold and you're an auto and in CA with only 91 octane. you would be the best third party gauge of this z1 package and its claims.
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Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
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