O.S. MAX 12TZ (P) - T5 OS L-OS11375 This engine features a 5-port liner arrangement which provides jaw-dropping levels of power. Please be aware this engine is not class legal for official racing in the U.K, but is the perfect choice for blowing away the competition at informal gatherings. As you would expect on a high engine of this type, it comes with P type crankshaft.
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