Authentic ATI ProCharger Pulley's in all available sizes!

Includes retaining bolt, washer and key.

F1, F2, P1, D1 - .875 SHAFT

Any BBC, SBC, or SBF (non-A/C) that uses a spring tensioner will be an offset pulley. The slide/fixed tensioner for any of the same application uses a non-offset. 

Note: Put in the notes section which vehicle make and model you have. 

WARNING: Never strike the ProCharger pulley with a hammer or other tool under any circumstance! Evidence of such force will void the warranty, as serious damage to the precision bearings within the ProCharger could occur. 

Figuring out sizes:

Let's take a six rib pulley for an example.

DP400I-06D -  This pulley is a 4.00 diameter size. The 06D means it is a six rib.

To determine the impeller speed, the following formula is used:

Maximum impeller speed = crankshaft pulley diameter (N1) divided by supercharger pulley diameter (N2),multiplied by the step-up ratio (4.10 for the P-series/D series - 5.40 for the F series), multiplied by engine rpm at redline.

The blower rpm calculator below can help you out.

https://www.procharger.com/calculators

 How much boost the blower can produce depends on many variables: 

* Cubic inch. The larger the engine the less boost it will make with a supercharger.

* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.

* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.

* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.

* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.

* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost.

* Supercharger. A D-1SC will generally make more boost with any given pulley than a P-1SC will. The P & D series have a 4.10/1 gear ratio, the modern F series have a 5.40/1 gear ratio. An F-1A will generally make quite a bit more boost with any given pulley than a D-1SC will, partially as a result of the 5.40/1 gear ratio. 

When installing a new blower belt, don't go wide open throttle for the first hour as the belt needs to break in. Once the belt is broken in you will find that it has stretched, and it will then need to be tightened back down. Do this before going wide open throttle with a new belt, as once a belt slips it is more prone to slippage. Bob

Systems that use standard series pulleys
P1SC, P1SC-1, P1SC-2, P-1X, D1, D1SC, D-1X, F-1D, F1, F1-A, F1-C, F1-R, F-1A-94, F-1X & F-2 Superchargers

LS1 F-BODY 6 RIB BELT / PULLEY MATRIX (Old style bracket)

Matrix for 5.82" ( 6" ) crank pulley

CRANK PULLEY              BLOWER PULLEY             BELT

DC017A-006                DP300I-06D                  DB355I-006

DC017A-006                DP310I-06D                  DB355I-006

DC017A-006                DP320I-06D                  DB355I-006

DC017A-006                DP340I-06D                  DB355I-006

DC017A-006                DP350I-06D                  DB365I-006

DC017A-006                DP360I-06D                  DB365I-006

DC017A-006                DP370I-06D                  DB365I-006

DC017A-006                DP385I-06D                  DB370I-006

DC017A-006                DP400I-06D                  DB370I-006

DC017A-006                DP410I-06D                  DB370I-006

DC017A-006                DP425I-06D                  DB374I-006

DC017A-006                DP438I-06D                  DB374I-006

DC017A-006                DP450I-06D                  DB374I-006

DC017A-006                DP463I-06D                  DB380I-006

DC017A-006                DP475I-06D                  DB380I-006

LS1 F-BODY 8 RIB BELT / PULLEY MATRIX (Old style bracket)

Matrix for 7.65" crank pulley DC017A-008

ATI Dampner #918853

CRANK PULLEY         BLOWER             PULLEY BELT

DC017A-008            DP340I-08D      DB392I-008

DC017A-008            DP355I-08D      DB392I-008

DC017A-008            DP370I-08D      DB400I-008

DC017A-008            DP385I-08D      DB400I-008

DC017A-008            DP390I-08D      DB400I-008

DC017A-008            DP400I-08D      DB400I-008

DC017A-008            DP413I-08D      DB408I-008

DC017A-008            DP425I-08D      DB408I-008

DC017A-008            DP438I-08D      DB415I-008

DC017A-008            DP450I-08D      DB415I-008

DC017A-008            DP463I-08D      DB415I-008

DC017A-008            DP475I-08D      DB415I-008

DC017A-008            DP500I-08D      DB415I-008

DC017A-008            DP525I-08D      DB427I-008

LS1 F-BODY 8 & 10 RIB BELT / PULLEY MATRIX (New style bracket)

Find what belt size you need here for your C5!

* Old Bracket, with Fixed Idlers (either size) factory tensioner*

4.75" Pulley = 97.0"
4.50" Pulley = 97.0"
4.37" Pulley = 96.6"
4.10" Pulley = 96.6"
3.85" Pulley = 96.0"


* Old Bracket, with Gates Tensioner attached*

4.50" Pulley = 99.7"
4.375" Pulley = 99.7"
4.10" Pulley = 99.4"
3.85" Pulley = 98.8"


* Stage II Brackets*

5.00" Pulley = 90.8"
4.75" Pulley = 90.5"
4.63" Pulley = 90.5"
4.50" Pulley = 90.0"
4.38" Pulley = 90.0"
4.25" Pulley = 90.0"
4.10" Pulley = 89.5"
4.00" Pulley = 89.5"
3.85" Pulley = 88.8"
3.70" Pulley = 88.8"
3.60" Pulley = 88.8"
3.50" Pulley = 88.8"
3.40" Pulley = 88.8"
3.20" Pulley = 88.8"
3.10" Pulley = 88.8"
3.00" Pulley = 88.8"

C5 BELT / PULLEY MATRIX STAGE II

Impeller speed @ 6500 ENGINE RPM

6500 ENGINE RPM

6-Rib D-series Crank dia Belt Impeller RPM - LS6

3.00 7.37 KO60888 65470

3.10 7.37 KO60888 63358

3.20 7.37 KO60888 61378

3.40 7.37 KO60888 57768

3.50 7.37 KO60888 56117

3.60 7.37 KO60888 54558

3.70 7.37 KO60888 53084

3.85 7.37 KO60888 51016

4.00 7.37 KO60895 49103

4.10 7.37 KO60895 47905

4.25 7.37 KO60900 46214

4.38 7.37 KO60900 44843

4.50 7.37 KO60900 43647

4.63 7.37 KO60905 42421

4.75 7.37 KO60905 41350

5.00 7.37 KO60908 39282

Impeller speed @ 6200 ENGINE RPM

6200 ENGINE RPM

6-Rib D-series Crank dia Belt Impeller RPM - LS1

3.00 7.37 KO60888 62448

3.10 7.37 KO60888 60434

3.20 7.37 KO60888 58545

3.40 7.37 KO60888 55102

3.50 7.37 KO60888 53527

3.60 7.37 KO60888 52040

3.70 7.37 KO60888 50634

3.85 7.37 KO60888 48661

4.00 7.37 KO60895 46836

4.10 7.37 KO60895 45694

4.25 7.37 KO60900 44081

4.38 7.37 KO60900 42773

4.50 7.37 KO60900 41632

4.63 7.37 KO60905 40463

4.75 7.37 KO60905 39441

5.00 7.37 KO60908 37469

2011-14 Mustang GT (8 rib)

2011-14 Mustang 6 Rib Shared Drive

1999-2003 GM Truck 6 Rib Shared Drive

2004-13 GM Truck 6 Rib Shared Drive