HOME
NEWS
CONTACT
ACCOUNT
Search
  Advanced Search  
Categories
2005+ Dodge Charger & Challenger->
2006-2009 Trailblazer SS->
2006-2019 Jeep Grand Cherokee SR->
2008-2009 Pontiac G8/G8 GXP->
2010-2022 Camaro->
2014-2016 Chevrolet SS->
Apparel & Misc.
Car Care Products->
Dodge Ram->
Mustang->
Vehicles
82-92 F-Body->
93-97 F-Body->
98-02 F-Body->
Braking->
Car Audio
Cooling System
Driveline->
Engine->
Assembled Shortblocks
Bare Blocks/Short Blocks
Bolts and Studs
Connecting Rods
Crankshafts
Engine Bearings
Engine Dress Up
Engine Tools
Fluids
Gaskets/Kits/Accessories
Oil Filters
Oil Pans
Oil Pumps
PCV System
Pistons & Rings
Pulleys & Balancers
Stroker Kits
Exhaust->
Exterior->
Fuel & Nitrous->
Ignition->
Induction->
Interior->
Packages
PCM/Electronics->
Suspension/Chassis->
Tires->
Valvetrain->
Wheels->
1997-2022 Corvette->
04-06 Pontiac GTO->
2004-2020 Cadillac CTS-V->
04-06 Cadillac XLR
1999-2018 GM Trucks->
00-06 Cadillac Escalade
2003-2009 Hummer H2->
Untitled Document
Manufacturers
What's New? more
2017+ Dodge Challenger R/T Hooker Headers Blackheart Catback Exhaust System
2017+ Dodge Challenger R/T Hooker Headers Blackheart Catback Exhaust System
$1,112.95
Online Security

98-02 LS1 ASP Racing 25% Underdrive Crank/Alternator Pulleys
[948520]


$255.99
   Manufacturer:ASP Racing
   Description:SFI (approved) LS1 Camaro / Firebird Pulley Kit - Charges @ idle

This kit includes an overdrive alternator pulley that is smaller diameter in size to help retain the standard voltage. In addition to the overdrive alternator pulley includes the crank pulley. This is recommended for cars with an automatic transmission and/or a high powered stereo.

Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to the drive wheels. Typically, a set of Auto Specialties street pulleys will increase horsepower by 12-15, and increase mileage by 2 to 3 MPG. All pulleys are manufactured from Billet Steel or Aluminum, exceeding factory quality.

ASP LS1 underdrive pulley kit reduces parasitic power losses associated with high accessory speeds, freeing up additional HP. It also reduces the rotating inertia on the front of the crankshaft allowing for faster revving.ASP LS1 underdrive pulley kit reduces parasitic power losses associated with high accessory speeds, freeing up additional HP. It also reduces the rotating inertia on the front of the crankshaft allowing for faster revving. We have seen just over 13 rear wheel hp increase with this kit installed on stock LS1s.

When replacing the crankshaft pulley on an LS1, a new GM crank bolt is required. This is due to that bolt being a torque-to-yield bolt; meaning that it can only safely be used once. This bolt is sold seperatly and is available in a drop-down menu below if you would like one included with your order.

Also available to help with installation of the crank pulley is the longer crank pulley bolt. Click HERE to read more.

Crank pulley and Alternator Pulley in this kit.

NOTE: New belts are required for this kit. The correct belt sizes for this kit are:

Accessory Belt = 755K6
A/C Belt = 378K4

   Available Options: Options:
Current Reviews: 2
This product was added to our catalog on Tuesday 26 April, 2005.
Reviews
Customers who bought this product also purchased
98-02 LS1 Camshaft Installation Kit
98-02 LS1 Camshaft Installation Kit
LS1 Melling Oil Pump (High Volume)
LS1 Melling Oil Pump (High Volume)
 Shopping Cart more
0 items
Manufacturer Info
ASP Racing
Other products
Reviews more
98-02 LS1 ASP Racing 25% Underdrive Crank/Alternator Pulleys
UNREAL FAST SHIPPING!... Ordered Tuesday night, Rcvd Thursda ..
5 of 5 Stars!
Sites We Sponsor
Information