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Induction is one of the most important to intake engine. When VTEC engages, a huge amount of air to the engine. J's Racing developed big bore throttle Body which outer diameter is 60mm and inner diameter is 56mm. Spoon developed the special taper bore to encourage "VENTURI" effect to increase the air volume and efficiency to the engine. Mid-range power , throttle response and acceleration will be remarkabily improved. Comes with new calibrated sensors.

Here are detail of the throttle Body:
1 - Spoon TB 60mm outer vs stock inner 54mm. A 25% more flow to the engine.
2 - Throttle plate changed from 50mm to 56mm. Does not require port matching to intake manifold.
3 - Taper bore outside of the throttle Body for flow efficiency.
4 - Taper bore on the other side of the throttle and with the "Venturi effect" flow efficiency will be increased by 23%.



Pm For Pricing!!!
 

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^ dont know about the CR-Z but untuned a bored TB on a TSX made 5whp or so. A tune def brings out the benefit of parts like a TB or an Intake manifold for sure but id be curious to see how much power it makes. If you have an intake it makes the intake slightly more efficient also

If you dont plan on tuning the most cost effective TB mod is to send it to a company like maxbore and just bore your stock one.
 
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