|
What do
Underdrive
Pulleys do?
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.
|
Nitride
Overdrive
Alternator
Pulley
|
4.6L - 2 & 4
V, Ford Mustang
Short Water Pump
Pulley Some
street systems
require the use
of the short
water pump
pulley. Before
ordering please
check to see if
your vehicle
uses this design
water pump
pulley.
Part # ASP520123
*
|
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Nitride |
Zinc |
Hard Coat Black
Alum |
Hard Coat Blue
Alum |
Hard Coat Red
Alum |
Hard Coat Clear
Alum |
|
05-07 |
4.6
L GT |
25%
HarmonicDampner
8% up 90 |
|
 |
ASP527305
$279.95 |
|
|
|
01-04 |
4.6 GT |
25%
HarmonicDampner26%
Water Pump8%
Alternator |
950 RPM |
|
ASP522328
$244.95 |
|
|
|
99-01 |
4.6Cobra |
25%
HarmonicDampner26%
Water Pump10%
Alternator |
950 RPM |
|
ASP522375
$244.95 |
|
|
|
96-00 |
4.6 GT |
25%
HarmonicDampner26%
Water Pump8%
Alternator |
950 RPM |
|
ASP527328
$238.95 |
|
|
|
96-00 |
4.6Cobra |
25%
HarmonicDampner26%
Water Pump10%
Alternator
|
950 RPM
|
|
ASP527375
$238.95 |
|
|
|
96-00 |
4.6 GT |
25% Alum
Spacer26% Water
Pump8%
Alternator |
950 RPM |
|
ASP527728
$136.50 |
|
|
|
96-97 |
4.6Cobra |
25% Alum
Spacer26% Water
Pump10%
Alternator |
950 RPM |
|
ASP527775
$136.50 |
|
|
|
94-95 |
5.0 |
26% Crank |
750 RPM |
|
ASP523500
$47.50 |
ASP623500
$49.95 |
ASP823500
*
$49.50 |
|
94-95 |
5.0 |
26% Crank30%
Water Pump2 3/4"
Alternator |
950 RPM |
|
ASP525928
$109.95 |
ASP625928
$94.95 |
ASP825928
*
$118.95 |
|
79-93 |
5.0 |
25% Crank |
850 RPM |
|
ASP520100
$54.00 |
ASP620100
$54.00 |
ASP820100
*
$56.50 |
|
85-86 |
5.0S/Tran |
25% Crank2 3/4"
Alternator |
1100 RPM |
|
ASP520105
$65.95 |
ASP620105
$64.95 |
ASP820105
*
$74.95 |
|
79-93 |
5.0 |
25% Crank15%
Water Pump |
850 RPM |
|
ASP520120
$84.95 |
ASP620120
$84.95 |
ASP820120
*
$91.50 |
|
79-93 |
5.0 |
25% Crank15%
Water Pump1 7/8"
Alternator |
700 RPM |
|
ASP520124
$101.95 |
ASP620124
$101.95 |
* |
|
79-93 |
5.0 |
25% Crank15%
Water Pump2 1/2"
Alternator |
950 RPM |
|
ASP520125
$101.95 |
ASP620125
$101.95 |
ASP820125
$112.95 |
ASP829125
$112.95 |
ASP822125
$112.95 |
ASP824125
$112.95 |
|
79-93 |
5.0 |
25% Crank15%
Water Pump2 3/4"
Alternator |
1100 RPM |
|
ASP520128
$105.95 |
ASP620128
$89.95 |
ASP820128
$114.95 |
ASP829128
$114.95 |
ASP822128
$114.95 |
ASP824128
$114.95 |
|
79-93 |
5.0 |
25% Crank15%
Water Pump3 1/2"
Alternator |
1500 RPM |
|
|
|
ASP820126
*
$184.95 |
|
79-93 |
5.0 |
25% Power
Steering Pulley
|
|
|
|
|
FMC025
$45.00 |
|
2001
|
4.6GT |
26% Water Pump
Pulley,Short
water pump |
950 RPM |
|
|
|
ASP520123
$60.50 |
Click-On Price to Order
Mustang V6
|
1994-98 3.8 L
Ford Mustang
Crank Pulley
25% Reduction
Crank and
Alternator
Pulley Kit, This
pulley kit will
give you 9+ Rear
wheel HP.
Part# ASP826300
|
 
Above images in order from left to
right; 1999-00
3.8L V6 stock
dampner / new
stock dampner
with factory
pulley removed /
new 25%
reduction crank
pulley and new
harmonic dampner
All ASP 25%
Underdrive
Street System
Harmonic Dampner
Design add 10+
Rear wheel HP.
Part# ASP820117
& ASP820122
*
|
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Nitride |
Zinc |
Hard Coat Black
Alum |
|
05-07 |
4.0L |
25% dampner
|
850RPM |
|
|
|
ASP526400
$265.00 |
|
01-04 |
3.8 |
25% Dampner
Crank Pulley
|
950 RPM |
|
|
|
ASP820122
$224.95 |
|
99-00 |
3.8 |
25% Dampner
Crank Pulley
|
950 RPM |
|
|
|
ASP820117
$224.95 |
|
94-98 |
3.8 |
25% Crank
|
950 RPM |
|
|
|
ASP826300
$91.95 |
|
94-98 |
3.8 |
25% Crank2 3/4"
Alternator
|
950 RPM |
|
|
|
ASP826308
$106.95 |
*
Clear HC., Red and Blue
also available.
Adjuster Bracket
|
84-93 |
5.0 |
Adjuster
Bracket |
ASP020400
*
$10.00 |
*
Allows you to
retain factory belt with
part no. 520100 & 520120
Click-On Price to Order
1989-94 Thunderbird Super Coupe 3.8L V6L V6
1989-94 3.8L
S/C Blower
Pulley
10% Blower
Overdrive Pulley
Adds 3 PSI
Boost, Adds 12+
HP Part#
ASP52009 |
1989-94 3.8L
S/C Street
Pulley Kit
Street Pulley
Kit 25%
Reduction Crank
Pulley, 29%
Water Pump, 3"
Alt.Part#
ASP520425 |
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Nitride |
Hard Coat Black
Alum |
|
94-97 |
4.6 |
25% Harmonic
Dampner 26% Water
Pump 15%
Alternator |
900 RPM |
|
ASP527328
$238.95 |
|
|
94-97 |
4.6 |
25% Crank 26%
Water Pump 15%
Alternator |
900 RPM |
|
ASP527728
$136.50 |
|
|
89-95 |
3.8 SC |
10% Blower
OverdriveAdds 3
PSI Boost |
|
|
ASP520009
$59.95 |
|
|
89-95 |
3.8 SC |
25% Crank29%
Water Pump 3"
Alternator |
950 RPM |
|
ASP520425*
$224.00 |
|
|
90-98 |
3.8 |
25% Crank2 3/4"
Alternator |
950 RPM |
|
|
ASP826308
$106.95 |
|
90-93 |
5.0 |
25% Crank 29%
Water Pump2 3/4"
Alternator |
950 RPM |
|
ASP523528
$119.95 |
|
*
Crank pulley
is anodized Hard Black
Coat
Click-On Price to Order
Crown Victoria / Grand Marquis
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Steel |
|
81-89 |
5.0, 351W |
25% Crank |
850 RPM |
|
ASP928900
$150.00 |
Click-On Price to Order
Contour / Cougar with SVT Duratec
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Clear HardCoat
Alum |
|
96-99 |
SVT Duratec |
21% Reduction |
1050
RPM
|
|
ASP840103
$124.95 |
|
95-99 |
2.0L |
15% Reduction |
800
RPM
|
|
ASP840110
$124.95 |
Click-On Price to Order
Taurus SHO
DISCONTINUED
|
Year |
Engine |
Pulley
Description |
Full Charge |
- Info-
|
Nitride |
|
93-95 |
3.2 A (1
Blt)Automatic |
25% Crank25%
Alternator |
1050 RPM |
|
ASP926970
$199.95 |
|
89-93 |
3.0 (2 Blts) |
25% Crank4
Pulley Kit |
1000 RPM |
|
ASP924350
$261.00 |
|
94-95 |
3.0 - 5sp |
25% Crank25%
Alternator |
1000 RPM |
|
ASP924372
$261.00 |
|
96-99 |
SHO |
25% Reduction |
-
|
|
ASP928300
$179.95 |
Click-On Price to Order
Ford Truck
Click-On Price to Order
1999-2004 SVT Lightning Truck
|
1999-2004 5.4L
Blower Pulley:
1999-04, - 5.4 L Ligntning Truck
Blower Pulley,
2.80", adds 3
psi to engine
and 23.2 extra
hp, Part#
ASP520003
*
|
|
Year |
Engine |
Pulley
Description |
- Info-
|
Nitride |
|
99-03 |
5.4 |
Blower
Compressor
Overdrive Pulley
2.80"
Diameter(+2 to
3"psi) |
|
ASP520003
*
$109.95 |
|
99-00 |
5.4 |
Blower Crank
Pulley 7.90"
Diameter
(+2"psi) |
|
ASP820116
$200.00 |
|
01-04 |
5.4 |
Blower Crank
Pulley 7.90"
Diameter (+2"psi
lightning +0"psi
harley) |
|
ASP820116a
$200.00 |
|
99-00 |
5.4 |
Blower Crank
Pulley 8.40"
Diameter
(+4"psi)
|
|
ASP820116ps
$200.00 |
|
01-04 |
5.4 |
Blower Crank
Pulley 8.40"
Diameter (+4"psi
lightning +2"psi
harley)
|
|
ASP820116aps
$200.00 |
|
99-00 |
5.4 |
Blower Crank
Pulley 9.00"
Diameter
(+6"psi)
|
|
ASP820116ps9
$200.00 |
|
01-04 |
5.4 |
Blower Crank
Pulley 9.00"
Diameter (+6"psi
lightning +4"psi
harley)
|
|
ASP820116aps9
$200.00 |
|
How
to install the
ASP Blower Crank
Pulley in just 1
hour!
Click-Here
for more info.
|
|
How
to install the
ASP Blower
Pulley in just
1/2 hour!
Click-Here
for more info.
|
Click-On Price to Order
Early Model Crank Pulleys
|
Year |
Engine |
Pulley
Description |
- Info-
|
Nitride |
|
65-69 |
289 (3 Bolt) |
25% Reduction -
1 V-Groove |
|
ASP922900
$125.00 |
|
65-69 |
289 (3 Bolt) |
2 V Grooves |
|
ASP924200
$150.00 |
|
70-78 |
302, 351 W |
25% Reduction -
1 V Grooves |
|
ASP924000
$125.00 |
|
70-78 |
302, 351 W |
2 V Grooves |
|
ASP924100
$150.00 |
|
68-87 |
429, 460 |
25% Reduction -
3 V Grooves |
|
ASP925600
$150.00 |
Click-On Price to Order
Alternator Pulleys
|
Nitride
Overdrive
Alternator
Pulley:
|
For
Serpentine
Belt
Systems:
-
32%
overdrive
alternator
pulley.
-
Increased
charging
capacity.
-
CNC
-machined
billet steel
nitride
coated.
|
|
Year |
Engine |
Pulley
Description |
- Info-
|
Nitride |
Zinc |
Hard Coat Black
Alum |
|
|
Early Model |
3 1/4" 1
V-Groove |
|
|
|
ASP820003
$54.95 |
|
79-95 |
5.0 |
1 7/8"
Alternator |
|
ASP520004
$22.50 |
ASP620004
$22.50 |
|
|
79-93 |
5.0 |
2 1/2"
Alternator |
|
ASP520005
$22.50 |
ASP620005
$22.50 |
ASP820005
$19.95 |
|
79-95 |
5.0 |
2 3/4"
Alternator |
|
ASP520080
$26.95 |
|
ASP820080
$26.95 |
|
79-93 |
5.0 |
3 1/2"
Alternator |
|
|
|
ASP820006
$95.00 |
Click-On Price to Order |
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