Parts Now Pay Later with
Log In Cart
Log In
Create An Account
Log In Cart
Your Cart Is Empty
Cart Total
Edit Your Cart Checkout
Free Shipping Over $299.99

Free Shipping Over $299.99

Orders of $299.99 or more ship free within the continental U.S.
Shipping to Alaska and Hawaii is additional and not included.
We do not ship international at this time.

Shipping Policy

AEM 88-91 Civic/CRX / 92-01 Prelude Adjustable Fuel Pressure Regulator
Part Number: 25-303BK

AEM 88-91 Civic/CRX / 92-01 Prelude Adjustable Fuel Pressure Regulator-A1
Images may be for reference only

AEM 88-91 Civic/CRX / 92-01 Prelude Adjustable Fuel Pressure Regulator
Part Number: 25-303BK

Be the first to review!
Was: $183.00
$163.95
Save: $19.05 (10%)

Reward Points

It pays to shop with K Series Parts and our reward points program! For every $1.00 you spend you earn reward points.

They are easy to earn, just log in to your account when you check out. If you don't have one it is free and easy to setup.

They are easy to use during check out. Click on the "Have Reward Points?" on the shipping and payment selection page.

Reward Point Program Details

You earn 2 points for every $1.00 that you spend.

100 points equal a $1.00 discount.

Maximum discount per order is 5% of the order total.

There is no minimum order total to redeem points.

Points do not apply to shipping or sales tax.

Points are not redeemable for cash.

The point value per dollar, points earned per purchase, and order minimum are subject to change.

Earn 328 reward points. Learn More

Not legal for sale or use in California on any pollution controlled motor vehicles.
1 In Stock
Ask us a Question

Product Details

Part Number: 25-303BK
UPC: 840879020040
Brand: AEM Electronics
CARB Approved: No
AEM's Honda/Acura Adjustable Fuel Pressure Regulators are capable of supporting enough fuel flow for engines up to 1000 horsepower. Our patented interchangeable discharge ports enable the regulator's output to match the output of any fuel pump. AEM includes a custom barb fitting to accommodate the factory fuel hose and the base of each regulator is tapped to accept a -6 AN or 9/16"x18 fittings.
  • CNC-machined from 6061-T6 billet aluminum
  • Mounts directly to O.E. fuel rail or AEM High Volume Fuel Rail
  • Patented interchangeable discharge orifices match output of virtually any fuel pump (single large port included)
  • Accept a -6 AN or 9/16"x18 fittings
  • Adjustable from 20 psi to maximum fuel pump capacity
  • Boost dependent rising fuel pressure rate (1:1)
  • No additional parts required for installation
  • Manufactured and assembled in the USA
  • Patent # 6,298,828
A single large discharge orifice is included, additional ports are sold separately
Not legal for sale or use in California on any pollution controlled motor vehicles. See http://www.semasan.com/emissions for state by state emissions requirements.
There is a 5% cancellation fee if you order this product and want to ship it to the state of California.

Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.

Vehicle Fitment

Acura Integra
1990 Acura Integra GS
1991 Acura Integra GS
1992 Acura Integra GS
1993 Acura Integra GS
1992 Acura Integra GS-R
1993 Acura Integra GS-R
1986 Acura Integra LS
1987 Acura Integra LS
1988 Acura Integra LS
1989 Acura Integra LS
1990 Acura Integra LS
1991 Acura Integra LS
1992 Acura Integra LS
1993 Acura Integra LS
1987 Acura Integra LS Special Edition
1988 Acura Integra LS Special Edition
1986 Acura Integra RS
1987 Acura Integra RS
1988 Acura Integra RS
1989 Acura Integra RS
1990 Acura Integra RS
1991 Acura Integra RS
1992 Acura Integra RS
1993 Acura Integra RS
Acura NSX
1999 Acura NSX Alex Zanardi Edition
1991 Acura NSX Base
1992 Acura NSX Base
1993 Acura NSX Base
1994 Acura NSX Base
1995 Acura NSX Base
1996 Acura NSX Base
1997 Acura NSX Base
1998 Acura NSX Base
1999 Acura NSX Base
2000 Acura NSX Base
2001 Acura NSX Base
1995 Acura NSX T
1996 Acura NSX T
1997 Acura NSX T
1998 Acura NSX T
1999 Acura NSX T
2000 Acura NSX T
2001 Acura NSX T
2002 Acura NSX T
Acura TL
1995 Acura TL Base
1996 Acura TL Base
1997 Acura TL Base
1998 Acura TL Base
1995 Acura TL Premium
1996 Acura TL Premium
1997 Acura TL Premium
1998 Acura TL Premium
Acura Vigor
1992 Acura Vigor GS
1993 Acura Vigor GS
1994 Acura Vigor GS
1992 Acura Vigor LS
1993 Acura Vigor LS
1994 Acura Vigor LS
Honda CRX
1988 Honda CRX HF
1989 Honda CRX HF
1990 Honda CRX HF
1991 Honda CRX HF
1988 Honda CRX Si
1989 Honda CRX Si
1990 Honda CRX Si
1991 Honda CRX Si
Honda Civic
1990 Honda Civic EX
1991 Honda Civic EX
1988 Honda Civic RT 4WD
1989 Honda Civic RT 4WD
1990 Honda Civic RT 4WD
1991 Honda Civic RT 4WD
1989 Honda Civic Si
1990 Honda Civic Si
1991 Honda Civic Si
Honda Insight
2000 Honda Insight Base
2001 Honda Insight Base
2002 Honda Insight Base
Honda Prelude
1997 Honda Prelude Base
1998 Honda Prelude Base
1999 Honda Prelude Base
2000 Honda Prelude Base
1995 Honda Prelude SE
1992 Honda Prelude Si
1993 Honda Prelude Si
1994 Honda Prelude Si
1995 Honda Prelude Si
1996 Honda Prelude Si
1992 Honda Prelude Si 4WS
1993 Honda Prelude Si 4WS
1997 Honda Prelude Type SH
1998 Honda Prelude Type SH
1999 Honda Prelude Type SH
2000 Honda Prelude Type SH
2001 Honda Prelude Type SH
1993 Honda Prelude VTEC
1994 Honda Prelude VTEC
1995 Honda Prelude VTEC
1996 Honda Prelude VTEC

Reviews ★★★★★ ★★★★★

No Reviews Yet!

Write a Review

Also Bought

AEM Electronics 90-93 Accord / 92-01 Prelude High Volume Fuel Rail
$151.95
AEM Electronics 90-93 Accord / 92-01 Prelude High Volume Fuel Rail
Grams Performance Black 0-120 PSI Fuel Pressure Gauge
$20.99
Grams Performance Black 0-120 PSI Fuel Pressure Gauge
DeatschWerks DW400 In-Tank Fuel Pump with Universal Install Kit
$239.00
DeatschWerks DW400 In-Tank Fuel Pump with Universal Install Kit
Mishimoto Silver Radiator Stay
$14.95
Mishimoto Silver Radiator Stay
Mishimoto Polished Aluminum Coolant Reservoir Tank
$92.95
Mishimoto Polished Aluminum Coolant Reservoir Tank
AEM Electronics 94-01 Integra / 96-00 Civic / 97-01 Prelude High Flow Fuel Filter
$143.95
AEM Electronics 94-01 Integra / 96-00 Civic / 97-01 Prelude High Flow Fuel Filter
Fuelab Black -6AN In-Line Fuel Filter (10 Micron)
$122.55
Fuelab Black -6AN In-Line Fuel Filter (10 Micron)
Fuelab Fuel Pressure Gauge EFI, 0-120psi
$28.21
Fuelab Fuel Pressure Gauge EFI, 0-120psi
NRG 350mm Black Suede Neochrome Spoke Reinforced Steering Wheel
$180.00
NRG 350mm Black Suede Neochrome Spoke Reinforced Steering Wheel
Rywire Titanium VTEC Oil Pressure Sensor Delete Bolt
$10.00
Rywire Titanium VTEC Oil Pressure Sensor Delete Bolt
Grams Performance B/D/F/H 550cc Injector Kit
$367.99
Grams Performance B/D/F/H 550cc Injector Kit
Vibrant Performance -6AN Straight Hose End Fitting
$8.59
Vibrant Performance -6AN Straight Hose End Fitting

Free Shipping

K Series Parts offers free shipping for the majority of items that we sell that are shipped inside the continental United States.

Free shipping is done by the most cost effective shipping method for each order and delivery can takes 3 to 5 days on average.

Faster express shipping is available for an additional charge and calculated at checkout or on the edit basket page.

Certain products are not included in the free shipping, shipped via truck freight, or fulfilled by an outside supplier.

Alaska, Hawaii, and international orders are charged shipping and it is calculated by the website at checkout or on the edit basket page.

Instant Discount

Add this item to your cart to get an instant discount!

Not Available for Pickup

This item is not currently available for pick-up in our retail showroom and will be shipped directly to you.