Atomic LS Throttle Body 103mm, 4 Bolt

MSD's billet throttle body assembly features a unique parabolic bore design

PART# 2945

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*TPS and IAC not included and are sold separately as PN 2942 or reuse yours from your OEM throttle body.


MSD's LS Throttle Body answers the need for a high quality throttle body with a mechanical throttle mechanism that bolts to most factory and aftermarket intakes. The parabolic bore form design helps deliver excellent drivability characteristics during part throttle that typical billet straight bore throttles just can't deliver. We incorporated factory style bearings and seals on the throttle that can withstand years of use on the street or strip.


  • Parabolic design for precise control, smoother off-idle response and improved part-throttle driveability
  • Contoured inlet profile outflows the competition's big-bore throttle bodies
  • Less shaft twist for superior TPS signal stability
  • Billet body with stainless steel shaft
  • Robust throttle cam assembly, featuring a three-plate design
  • Dual ball-bearing design offers shaft stability and smoother operation
  • 4-bolt mounting for easy installation


Emission Code4
Product TypeLS Throttle Body
WarrantyLimited 90 Day
Part Number2945

Service Parts


This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Tech Resources

*TPS and IAC not included and are sold separately as PN 2942 or reuse yours from your OEM throttle body.

Warranty Information

Limited 90 Day: See Details
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

      Some parts are not legal for use in California or other states with similar regulations.