Thread: Holley Hooker BlackHeart "Mobi1na" Exhaust Development
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Old 02-02-2017, 09:21 PM   #91
Evil-Bee-NH
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Quote:
Originally Posted by Jason@JacFab View Post
Probably RPM? Unless there is someone else skipping that step too...


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I agree likely RPM I know the ZZP bolts right in no issues.
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