

Hero image 0 of Holley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style, 0 of 6
Holley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style
(No ratings yet)
Check if this fits your vehicle
Key item features
- Versatile Fitment: Installs in fuel tanks ranging from 7.5 to 12 inches deep, accommodating a wide variety of applications with a low profile design of only 1.275 inches above the mounting surface.
- Innovative Clamping: Features an innovative clamping system allowing 360-degree rotation for easy clocking of plumbing and wiring, and flexible placement within the tank.
- Consistent Fueling: Includes an innovative Holley Hydramat (3 x 15 inch mounting flange) with 6 clocking pin locations for 360-degree adjustment, ensuring a consistent fuel supply.
- Robust Construction: Constructed from black anodized aluminum for corrosion resistance and long-lasting durability, featuring 1/4 NPT ports for diverse plumbing options.
- High Performance: Supports up to 1200 EFI or 1450 Carb HP (at 60 PSI, 13.5 Volts, 16.9 AMP Draw) with a 525 LPH pump.
- Easy Conversion: Facilitates quick and easy conversion of factory tanks or fuel cells to an in-tank EFI fuel system, requiring basic tools and no welding or fabrication.
- Vibration Control: The billet aluminum module design incorporates a billet pump hanger bracket to effectively control pump vibration.
Generated by AI
Specs
- Fuel injection accessory & part typeFuel Module
- BrandHolley
- Automotive parts divisionPerformance
- Vehicle fitment typeSpecific
- Items includedHolley Hydramat
- MaterialAluminum
Current price is USD$876.95
Price when purchased online
- Free shipping
Free 90-day returns
How do you want your item?
Columbus, 43215
Arrives by Mon, Feb 9
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
More seller options (1)
Starting from $876.95
Compare with similar items
| Product | Viewing this itemHolley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style ![]() $876.95 current price $876.95 | Holley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module ![]() $662.30 current price $662.30 | Holley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module ![]() $599.95 current price $599.95 | Holley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module ![]() $423.01 current price $423.01 | Holley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module ![]() $562.95 current price $562.9511 out of 5 Stars. 1 reviews | Holley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module ![]() $665.95 current price $665.95 | Holley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module ![]() $665.95 current price $665.95 | Holley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit ![]() $587.95 current price $587.95 | Holley Performance 12-145 Fuel Pump Module Assembly ![]() $849.95 current price $849.95 | Holley Sniper 12-347 Holley 525 LPH Fuel Pump Module ![]() $441.95 current price $441.95 |
|---|
| Fuel injection accessory & part type | Fuel ModuleHolley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style | Fuel PumpHolley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module | Fuel Tank ModulesHolley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module | Fuel PumpHolley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module | Fuel PumpHolley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module | Fuel PumpHolley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module | Fuel PumpHolley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module | Fuel Pump ModuleHolley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit | Fuel Pump Module AssemblyHolley Performance 12-145 Fuel Pump Module Assembly | Fuel Pump ModuleHolley Sniper 12-347 Holley 525 LPH Fuel Pump Module |
|---|---|---|---|---|---|---|---|---|---|---|
| Vehicle fitment type | SpecificHolley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style | SpecificHolley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module | SpecificHolley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit | SpecificHolley Performance 12-145 Fuel Pump Module Assembly | SpecificHolley Sniper 12-347 Holley 525 LPH Fuel Pump Module |
| Items included | Holley HydramatHolley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style | Sniper EFIHolley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module | -Holley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module | Sniper EFIHolley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module | Sniper EFIHolley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module | Sniper EFIHolley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module | Sniper EFIHolley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module | -Holley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit | -Holley Performance 12-145 Fuel Pump Module Assembly | -Holley Sniper 12-347 Holley 525 LPH Fuel Pump Module |
| Material | AluminumHolley 12-135 Holley In-Tank RetroFit Fuel Module 525 LPH Returnless Style | Steel and PlasticHolley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module | SteelHolley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module | Steel and PlasticHolley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module | Steel and PlasticHolley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module | SteelHolley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module | Steel and PlasticHolley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module | Billet AluminumHolley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit | PlasticHolley Performance 12-145 Fuel Pump Module Assembly | 6061-T6 AluminumHolley Sniper 12-347 Holley 525 LPH Fuel Pump Module |
Now hiding additional rows in the Table
About this item
Product details
525 LPH Drop-In Retrofit EFI Fuel System w/Hydramat
Supports up to 1200 EFI or 1450 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 AMP Draw);
The Holley In-tank RetroFit Fuel Modules are now available with a 525 LPH Pump.
Convert your factory tank or fuel cell to an in-tank EFI fuel system quickly and easily! And- add the benefits of a Holley Hydramat in the process! The conversion is easily accomplished with basic tools and requires no welding or fabrication. The billet aluminum module design includes a billet pump hanger bracket to control pump vibration while also providing a low profile design to fit where space is at a premium. Holley's innovative clamping system and integrated fuel pump makes it easy.
Supports up to 1200 EFI or 1450 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 AMP Draw) Of course there are many variables, estimates are based on gasoline. Individual systems will vary based on fuel system design, regulator type, fuel cell location, etc...;
Supports up to 1200 EFI or 1450 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 AMP Draw);
The Holley In-tank RetroFit Fuel Modules are now available with a 525 LPH Pump.
Convert your factory tank or fuel cell to an in-tank EFI fuel system quickly and easily! And- add the benefits of a Holley Hydramat in the process! The conversion is easily accomplished with basic tools and requires no welding or fabrication. The billet aluminum module design includes a billet pump hanger bracket to control pump vibration while also providing a low profile design to fit where space is at a premium. Holley's innovative clamping system and integrated fuel pump makes it easy.
Supports up to 1200 EFI or 1450 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 AMP Draw) Of course there are many variables, estimates are based on gasoline. Individual systems will vary based on fuel system design, regulator type, fuel cell location, etc...;
- Retrofit Fuel Module 525 LPH-Returnless Style
- Installs in any fuel tank from 7.5†to 12†deep to fit a wide variety of applications
- The low profile design is only 1.275" thick above the tank mounting surface for added clearance when needed
- The innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit
- The clamping system allows you to rotate the unit 360 degrees for easier clocking of the plumbing and wiring locations under your ride
- Includes innovative Holley Hydramat to ensure consistent fuel supply. The 3†x 15†HydraMat mounting flange has 6 clocking pin locations to allow for 360 degree adjustment to clear sending unit levels or any tank floor restrictions that you might enco
- Black anodized aluminum construction for corrosion resistance and long lasting good looks
- Â1/4†NPT ports for a wide variety of plumbing options
- Optional roll over valve available
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Fuel injection accessory & part type
Fuel Module
Brand
Holley
Automotive parts division
Performance
Vehicle fitment type
Specific
Warranty
Warranty information
Manufacturer's Limited 90 Day Warranty
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
Similar items you might like
Based on what customers bought
Holley 12-172 Die-Cast In-Tank RetroFit Fuel Module Returnless System $736.95
$73695current price $736.95Holley 12-172 Die-Cast In-Tank RetroFit Fuel Module Returnless System
Shipping, arrives in 3+ daysHolley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module $662.30
$66230current price $662.30Holley Sniper EFI 12-377 350 LPH OE Style EFI Fuel Tank Module
Shipping, arrives in 3+ daysHolley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module $599.95
$59995current price $599.95Holley Sniper EFI 12-388 350 LPH OE Style EFI Fuel Tank Module
Save withShipping, arrives in 3+ daysHolley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module $423.01
$42301current price $423.01Holley Sniper EFI 12-384 350 LPH OE Style EFI Fuel Tank Module
Shipping, arrives in 3+ daysHolley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module $562.95
$56295current price $562.95Holley Sniper EFI 12-375 350 LPH OE Style EFI Fuel Tank Module
11 out of 5 Stars. 1 reviewsSave withShipping, arrives in 3+ daysHolley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module $665.95
$66595current price $665.95Holley Sniper EFI 12-383 350 LPH OE Style EFI Fuel Tank Module
Shipping, arrives in 3+ daysHolley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module $665.95
$66595current price $665.95Holley Sniper EFI 12-376 350 LPH OE Style EFI Fuel Tank Module
Shipping, arrives in 3+ daysHolley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit $587.95
$58795current price $587.95Holley 12-324 450 LPH Fuel Pump Module - Returnless w/ 220-20 OHM Sending Unit
Save withShipping, arrives in 3+ daysHolley Performance 12-145 Fuel Pump Module Assembly $849.95
$84995current price $849.95Holley Performance 12-145 Fuel Pump Module Assembly
Save withShipping, arrives in 3+ daysHolley Sniper 12-347 Holley 525 LPH Fuel Pump Module $441.95
$44195current price $441.95Holley Sniper 12-347 Holley 525 LPH Fuel Pump Module
Save withShipping, arrives in 3+ daysHolley Sniper 12-173 Dual 450 LPH In-Tank Retrofit Fuel Module with Return $819.95
$81995current price $819.95Holley Sniper 12-173 Dual 450 LPH In-Tank Retrofit Fuel Module with Return
Shipping, arrives in 3+ daysHolley Sniper 12-357 Fuel Pump Module - 340 LPH $530.95
$53095current price $530.95Holley Sniper 12-357 Fuel Pump Module - 340 LPH
Save withHolley Performance 12-946 Fuel Pump Module Assembly $409.95
$40995current price $409.95Holley Performance 12-946 Fuel Pump Module Assembly
Shipping, arrives in 3+ daysHolley Performance 12-132 Fuel Pump Module Assembly $870.95
$87095current price $870.95Holley Performance 12-132 Fuel Pump Module Assembly
Shipping, arrives in 3+ daysHolley Sniper 12-354 Fuel Pump Module - 525 LPH $518.95
$51895current price $518.95Holley Sniper 12-354 Fuel Pump Module - 525 LPH
Save withShipping, arrives in 3+ daysHolley Performance 12-944 Fuel Pump Module Assembly $409.95
$40995current price $409.95Holley Performance 12-944 Fuel Pump Module Assembly
Shipping, arrives in 3+ daysFuel Pump - Compatible with 1997 - 2000 Chevy S10 1998 1999 $88.95
$8895current price $88.95Fuel Pump - Compatible with 1997 - 2000 Chevy S10 1998 1999
195 out of 5 Stars. 19 reviewsShipping, arrives in 3+ daysFuel Pump Module Assembly $72.79
$7279current price $72.79Fuel Pump Module Assembly
Save withShipping, arrives in 2 daysHolley Performance 12-133 Fuel Pump Module Assembly $972.95
$97295current price $972.95Holley Performance 12-133 Fuel Pump Module Assembly
Save withShipping, arrives in 3+ daysHolley Sniper 12-353 Fuel Pump Module - 340 LPH $399.95
$39995current price $399.95Holley Sniper 12-353 Fuel Pump Module - 340 LPH
Save withShipping, arrives in 3+ days
Popular items in this category
Best selling items that customers love
Holley Performance 12-304 Fuel Pump Module Assembly $514.95
$51495current price $514.95Holley Performance 12-304 Fuel Pump Module Assembly
15 out of 5 Stars. 1 reviewsSave withShipping, arrives in 3+ daysHolley Performance 12-156 Fuel Pump Module Assembly $249.95
$24995current price $249.95Holley Performance 12-156 Fuel Pump Module Assembly
Save withShipping, arrives in 3+ daysHolley Performance 712-327-11 Mechanical Fuel Pump $236.95
$23695current price $236.95Holley Performance 712-327-11 Mechanical Fuel Pump
15 out of 5 Stars. 1 reviewsSave withShipping, arrives in 3+ daysHolley Performance 712-454-11 Mechanical Fuel Pump $249.95
$24995current price $249.95Holley Performance 712-454-11 Mechanical Fuel Pump
14 out of 5 Stars. 1 reviewsSave withShipping, arrives in 3+ daysHolley Performance 12-390-11 Mechanical Fuel Pump $241.95
$24195current price $241.95Holley Performance 12-390-11 Mechanical Fuel Pump
Save withShipping, arrives in 3+ daysHolley Performance 12-1800-2 Electric Fuel Pump $716.95
$71695current price $716.95Holley Performance 12-1800-2 Electric Fuel Pump
11 out of 5 Stars. 1 reviewsSave withShipping, arrives tomorrowHolley Performance 12-460-13 Mechanical Fuel Pump $255.95
$25595current price $255.95Holley Performance 12-460-13 Mechanical Fuel Pump
Save withShipping, arrives in 3+ daysHolley Performance 12-389-11 Mechanical Fuel Pump $241.95
$24195current price $241.95Holley Performance 12-389-11 Mechanical Fuel Pump
Shipping, arrives in 3+ daysHolley Performance 712-454-13 Mechanical Fuel Pump $293.95
$29395current price $293.95Holley Performance 712-454-13 Mechanical Fuel Pump
Save withShipping, arrives in 3+ daysHolley 12-327-11 110 GPH Mechanical Fuel Pump $124.96
$12496current price $124.96Holley 12-327-11 110 GPH Mechanical Fuel Pump
53 out of 5 Stars. 5 reviewsSave withShipping, arrives in 3+ daysHolley Performance 12-125 Electric Fuel Pump $449.95
$44995current price $449.95Holley Performance 12-125 Electric Fuel Pump
65 out of 5 Stars. 6 reviewsSave withShipping, arrives tomorrowHolley Performance 12-1500 Electric Fuel Pump $1,862.56
$1,86256current price $1,862.56Holley Performance 12-1500 Electric Fuel Pump
Shipping, arrives in 3+ daysHolley Performance 12-429 Electric Fuel Pump $169.95
$16995current price $169.95Holley Performance 12-429 Electric Fuel Pump
Shipping, arrives in 3+ daysHolley Performance 12-962 Electric Fuel Pump $255.95
$25595current price $255.95Holley Performance 12-962 Electric Fuel Pump
Save withShipping, arrives in 3+ daysHolley Performance 12-425 Electric Fuel Pump $88.31
$8831current price $88.31Holley Performance 12-425 Electric Fuel Pump
Shipping, arrives in 3+ daysHolley EFI 534-37 Mechanical Fuel Pump $649.95
$64995current price $649.95Holley EFI 534-37 Mechanical Fuel Pump
Save withShipping, arrives in 3+ daysHolley Performance 12-914 Electric Fuel Pump $388.95
$38895current price $388.95Holley Performance 12-914 Electric Fuel Pump
Shipping, arrives in 3+ daysHolley Performance 12-801-1 Electric Fuel Pump $204.95
$20495current price $204.95Holley Performance 12-801-1 Electric Fuel Pump
184.4 out of 5 Stars. 18 reviewsSave withShipping, arrives tomorrowHolley Performance 12-930 Electric Fuel Pump $194.95
$19495current price $194.95Holley Performance 12-930 Electric Fuel Pump
14 out of 5 Stars. 1 reviewsSave withShipping, arrives tomorrowHolley Performance 80000102 Electric Fuel Pump $137.95
$13795current price $137.95+$13.95 shippingHolley Performance 80000102 Electric Fuel Pump
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ days
Customer ratings & reviews
0 ratings|0 reviews
This item does not have any reviews yet
Related pages
- Fuel Rails
- Holley Fuel Rails
- Mercury Distributor Cap
- Mercury Villager Egr Valve
- Isuzu I-290 Fuel Pump Module Assembly
- Fuel Injection Rail Crossover Tube and Seals
- Mercury Mariner Egr Valve Control Solenoid
- Mercury Cougar Idle Air Control Valve
- Intake Couplings
- Fuel Injector Cold Start Valves
- Fuel Pump Bowl Gaskets
- High Pressure Oil Rail Kits










