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Old 04-03-2006, 04:00 PM   #1
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Default 421B

hello all its getting nice here and ready to run the buggy again. Last year i ran a top version 421b with a jammin jp-1 pipe and loved it. Locally ran small track had plenty of bottom end then went to big race and ran big track same thing had plenty of top end. Was thinking of getting a new engine for backup and was wondering if there is anything better out i wouldn't mind more power who wouldn't. Thought about buying a modded 421b but thought before i bought one to see if anybody thinks there is a more powerful one out there price doesn't matter. Thanks, Miamifanatic
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Old 04-03-2006, 08:02 PM   #2
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just stick with the 421b....
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Old 04-04-2006, 09:35 AM   #3
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Yeh you got the best right there. Modded 421's are crazy fast but $$$
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Old 04-05-2006, 04:44 PM   #4
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Default 421b

I have a 421b and was thinking of selling it for a jp mod # FX 21 B-5N. Does anyone know how the two compare? I noticed the 421b has mad topend but i've seen better low end grunt. Could it be the motor isn't fully broken in yet? It only has about 14 tanks through it. any comments on the jp b-5n would also be appreaciated.

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