Pro 275

BB NOS 5.0 – 2300
BB NOS over 5.0 – 2450 (905 & Smaller – 2400)
SB SINGLE – 2325
BB SINGLE – 2475
BB TT – 2700 (ANY SIZE TURBO) -50
BB TT (Non-HEMI) – 2650 (ANY SIZE TURBO) -25
SB TT 2425 (Up to 4.500 bore space, under 500 cu in)
SB TT 2600 (4.600 bore space, or over 500 cu. in.)
SB TT 2675 (Hemi)
SB PROCHARGER – 2400 (Stock Bore Space)
SB PROCHARGER – 2500 (4.500 Bore Space)
SB PROCHARGER – 2600 (4.600 Bore Space)
SB PROCHARGER – (HEMI add 50lbs. to any Bore Space Weight)
BB PROCHARGER – 2725 -25 (Non-HEMI – 2600)
BB VORTECH (131 MAX ONLY) 2675

Centrifugal Supercharger
The maximum specification for the compressor wheel tip to tip is limited to 140.99mm inducer diameter. Measurement will be taken at the point where the leading edge of the compressor wheel meets the inlet housing. All air entering the Supercharger must pass through a single inlet opening. Exducer backing plate and blade tip to tip dimensions may not exceed 188.99

(No Centrifugal entry with any gear drive or blower that is not readily available for immediate sale & delivery at least 21 days before race)

(No test or prototype of any kind allowed)

SB ROOTS – 2400
BB ROOTS – 2650
SB SCREW – 2575 (Stock Bore Space)
SB SCREW – 2625 (4.500 Bore Space)
SB SCREW – 2675 (4.600 Bore Space)
SB SCREW – (HEMI add 50lbs. to any Bore Space Weight)
BB SCREW 92 OVER – 2775 (Non- Hemi 2725)
BB SCREW – 2875 +40 (Non- Hemi 2785)
BB TWIN PROCHARGER – 2675
4 cyl. / 6 cyl. Combo -2475 (production engines only)
(-150 LBS any cast block cast head combo)
(-75 LBS for Cast Heads)