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Marine

68mm Mercruiser Throttle Body

TPIS Dual Bore 68MM Throttle Body for Mercruiser Mag 454 & 502 Engines - Have you upgraded yo...

TPIS Dual Bore 68MM Throttle Body for Mercruiser Mag 454 & 502 Engines - Have you upgraded your stock Mercruiser Big Block Chevy to a 540 or larger engine?  Increasing the bore size from 60mm to 68MM, this throttle body will let your big displacement engine breathe.  We fully dis-assemble each throttle body, CNC machine the bores, machine the throttle shafts for better air flow, and install new CNC machines throttle blades.  You must send us your Throttle Body for this Service, 3-4 WEEK D...

$279.95

Marine Throttle Body

TPIS Mono Blade TB For Mercury Racing HP Series Engines - This Monoblade throttle body is a no-br...

TPIS Mono Blade TB For Mercury Racing HP Series Engines - This Monoblade throttle body is a no-brainer upgrade from your stock HP twin bore 58MM throttle body.  Perfect for use when upgrading your 502 c.i. to a 540 c.i. or larger engine.  Accepts Factory TPS and IAC Motor.

$548.95

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