Custom Fabricated Throttle Shafts to suit 48mm Bore RB26 Throttle Bodies with added cutouts for increased cross sectional area when at wide open throttle.
 
You receive a Set / 3 Shafts in total.
1x LH Shaft
2x RH Shafts
 
 
- All dimensions including Bearing Journals are Toleranced to factory sizes.
- Material SS316
- Enlarging the throttle bores from 45mm Bore size to 48mm gives a 13.7 percent increase in cross sectional area However when combined with our modified throttle shafts the flow bench test showed a 28% increase in airflow.
 
Stock Throttle flowed 250cfm @ 28"
Enlarged Throttle with modified shafts flowed 320cfm & 28"
 
Calculation 320/250 = 1.28 = 28%
 
The throttle shaft modification also eliminates turbulence against the throttle blade behind the shaft. Providing smoother flow over the shaft. This resulted in the enlarged throttles having the same airspeed at a given test vacuum
 
For larger quantities feel free to contact us via email.
 
NOTE
We do not provide install data with these shafts, if you are purchasing these make sure you have the correct gear and knowhow to carry out the job. 
Alternatively IEE also provides throttle rebuild and oversize services.