Unorthodox Racing Pulley Sets are available in a number of configurations.

Standard Belt Layout (Underdrive)

Our pulley sets provide most of the power gains through weight loss (80-85%). The remaining part of the gains from these pulleys comes from underdriving of all the accessories (15-20%).

However, we do not push underdriving for two main reasons. First, it is important to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving.

In most applications all of our underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximum weight loss can be achieved at the crank where most of the horsepower gains are found.

Standard Belt Layout (Stock Diameter)

As with our stock diameter crank pulleys many of our customers have also asked for stock diameter pulley sets that do not underdrive their alternators, power steering pumps, superchargers and water pumps. Because of these requests we developed our stock diameter pulley sets. Many customers want the performance benefits of weight reduction without any sacrifices, especially audio enthusiasts as some audio competitions require voltage to remain at a specific level. With our stock diameter pulley sets the alternator and other accessories spin at stock speeds with NO underdrive. This is also important for stock or aftermarket supercharger systems. These systems are either driven off the alternator, air conditioning or power steering sections of the crank pulley and now you can use our stock diameter pulley sets with these supercharger systems and have the same boost you had with the factory crank pulley.st level with the use of the factory diameter crank pulley.

100% of the power gains from the stock pulley sets comes only from weight reduction versus the factory crank pulley. The reduced weight allows for more power transfer to the drive wheels.

Features

  • Real HP & torque gains across entire RPM range
  • One of the highest HP/Torque per dollar gains on the market
  • The broadest range of applications available
  • Over 8 years of use in “real world” applications from street to strip to rally to road course
  • Better than OEM belt fitment & alignment
  • Accessory pulleys available seperately for many applications
  • CAD designed & CNC’d from 6061 Aluminum billet

22 Items

//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS10151 Unorthodox Racing Pulleys - Pulley Set (SS10151)
Pulley Set
Incl Crank, Alternator & Idler Pulleys
Stock Diameter
53% Lighter Than Stock
8-12HP Increase
Weight : 3lb 9oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS10161 Unorthodox Racing Pulleys - Pulley Set (SS10161)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Stock Diameter
83% Lighter Than Stock
26-30HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS10261 Unorthodox Racing Pulleys - Pulley Set (SS10261)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Stock Diameter
82% Lighter Than Stock
10-14HP Increase
Weight : 2lb 8oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS10281 Unorthodox Racing Pulleys - Pulley Set (SS10281)
Pulley Set
Incl Crank & Alternator Pulleys
Stock Diameter
84% Lighter Than Stock
12-16HP Increase
Weight : 1lb 5.2oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS10361 Unorthodox Racing Pulleys - Pulley Set (SS10361)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Stock Diameter
83% Lighter Than Stock
26-30HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS1061 Unorthodox Racing Pulleys - Pulley Set (SS1061)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Stock Diameter
83% Lighter Than Stock
10-14HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS12191 Unorthodox Racing Pulleys - Pulley Set (SS12191)
Pulley Set
Incl Crank & Alternator Pulleys
Stock Diameter
78% Lighter Than Stock
7-11HP Increase
Weight : 13.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS1291 Unorthodox Racing Pulleys - Pulley Set (SS1291)
Pulley Set
Incl Crank, Alternator & Water Pump Pulleys
Stock Diameter
72% Lighter Than Stock
9-13HP Increase
Weight : 1lb 5oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS13141 Unorthodox Racing Pulleys - Pulley Set (SS13141)
Pulley Set
Incl Crank & Power Steering Pulleys
Stock Diameter
74% Lighter Than Stock
9-13HP Increase
Weight : 1lb 11.5oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS6131 Unorthodox Racing Pulleys - Pulley Set (SS6131)
Pulley Set
Incl Crank, Alternator & Water Pump Pulleys
Stock Diameter
83% Lighter Than Stock
12-16HP Increase
Weight : 1lb 1.6oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS731 Unorthodox Racing Pulleys - Pulley Set (SS731)
Pulley Set
Incl Crank, Alternator & Water Pump Pulleys
Stock Diameter
78% Lighter Than Stock
10-14HP Increase
Weight : 1lb 6.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SS741 Unorthodox Racing Pulleys - Pulley Set (SS741)
Pulley Set
Incl Crank & Alternator Pulleys
Stock Diameter
78% Lighter Than Stock
9-13HP Increase
Weight : 1lb 6.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU10151 Unorthodox Racing Pulleys - Pulley Set (SU10151)
Pulley Set
Incl Crank, Alternator & Idler Pulleys
Underdriven
63% Lighter Than Stock
10-14HP Increase
Weight : 2lb 13.2oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU10161 Unorthodox Racing Pulleys - Pulley Set (SU10161)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Underdriven
83% Lighter Than Stock
28-32HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU10261 Unorthodox Racing Pulleys - Pulley Set (SU10261)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Underdriven
82% Lighter Than Stock
12-16HP Increase
Weight : 2lb 8oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU10361 Unorthodox Racing Pulleys - Pulley Set (SU10361)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Underdriven
83% Lighter Than Stock
28-32HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU1061 Unorthodox Racing Pulleys - Pulley Set (SU1061)
Pulley Set
Incl Crank, Alternator, Power Steering & Water Pump Pulleys
Underdriven
83% Lighter Than Stock
12-16HP Increase
Weight : 2lb 7oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU6321 Unorthodox Racing Pulleys - Pulley Set (SU6321)
Pulley Set
Incl Crank & Alternator Pulleys
Underdriven
8% Lighter Than Stock
9-13HP Increase
Weight : 15.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU6331 Unorthodox Racing Pulleys - Pulley Set (SU6331)
Pulley Set
Incl Crank, Alternator Pulleys & Alternator Pulley Nut
Underdriven
8% Lighter Than Stock
10-14HP Increase
Weight : 15.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU6341 Unorthodox Racing Pulleys - Pulley Set (SU6341)
Pulley Set
Incl Crank & Alternator Pulleys
Underdriven
8% Lighter Than Stock
10-14HP Increase
Weight : 15.4oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU8181 Unorthodox Racing Pulleys - Pulley Set (SU8181)
Pulley Set
Incl Eccentic, Alternator & Water Pump Pulleys
Underdriven
65% Lighter Than Stock
9-13HP Increase
Weight : 1lb 0oz
//d5otzd52uv6zz.cloudfront.net/5d407f5a-7cd7-4b74-b9b7-53856f3334ff-50.jpg SU8281 Unorthodox Racing Pulleys - Pulley Set (SU8281)
Pulley Set
Incl Eccentic & Alternator Pulleys
Underdriven
64% Lighter Than Stock
7-11HP Increase
Weight : 14oz

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