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Throttle Body Optimization

Optimization and boring helps to compensate for the flow deficiencies of the stock intake manifold and complements flow improvements made through cams or porting or the addition of  a pressurized intake.

Optimization

 Includes:

  1. Disassembly and cleaning
  2. Back Throttle Shaft Modification
  3. Machining of the top of the shaft
  4. Throttle Plate profiling of leading/trailing edge
  5. Reassembly

 Price: $199

 Boring & Optimization

 Includes the above plus:

  1. Boring of the Throttle Body
  2. *Fitting and installation of larger Throttle Plate
  3. Re-machining of the Throttle Body Inlet Taper

 *Warning; this involves removing the top layer of the shaft and will weaken the shaft, however, many factory throttle bodies come with this type of shaft direct from the factory.

Price: $499 

Flow Bench Testing Results 

Throttle Body

Flow *CFM

Gain *CFM

Price

Stock

435.7

0

$0

Optimized

476.5

40.8

$199

Bored & Optimized

514.5

78.8

$499

* Performed at 20.4 inches of water (standard for carburetors) 

Cores: We have some throttle body cores in stock that can be exchanged for your throttle body with a refundable core charge.  Please call.

Pricing:

Description Unit # Price* (US)
     
TB Optimization 25-SS-tbo-000 $ 199
TB Optimization & Boring 25-SS-tbb-000 $ 499
Throttle Body Core 25-SS-tbc-000 $ Call
 
Contact us for more information

Subaru throttle body boring

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