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Description
Holley Diecast In-Tank RetroFit Fuel Module Returnless System 12-159450 LPH Drop In Retrofit EFI Fuel System w Hydramat Supports up to 875 EFI or 1100 Carb HP (@ 60 PSI at 13. 5 Volts 16. 9 AMP Draw) Of course there are many variables, estimates are based on gasoline. Are you interested in an EFI retrofit kit, but just can't get past the complication of the fuel system? Holley is proud to introduce their Universal In Tank Retrofit Fuel Modules! Available in return and returnless versions, you can rest assured Holley
450 LPH Drop-In Retrofit EFI Fuel System w/Hydramat Supports up to 875 EFI or 1100 Carb HP (@ 60 PSI at 13.5 Volts / 16.9 AMP Draw) Of course there are many variables, estimates are based on gasoline.
Are you interested in an EFI retrofit kit, but just can't get past the complication of the fuel system? Holley is proud to introduce their Universal In-Tank Retrofit Fuel Modules! Available in return and returnless versions, you can rest assured Holley has the solution you need for your EFI fuel pump woes.
NOTES: It is recommended to use a Holley 12-753 30 Amp Fuel Pump Relay along with a minimum size of 12 Gauge wire for your installation. *** Maximum 6AN line and fitting size due to space limitations between unit and fuel tank.
Features:
- The easiest way to convert your vehicle to an in-tank, EFI fuel system
- Installs in any fuel tank from 7? to 12? deep to fit a wide variety of applications
- The low profile 5 inch diameter design is only 1.275 inch 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
- Die cast aluminum construction for corrosion resistance and long lasting good looks
- ?? NPT ports for a wide variety of plumbing options
- Ideal for Terminator EFI, Sniper EFI, MSD Atomic EFI or any TBI of EFI conversion
- Optional roll over valve available
- Two different fuel pumps are available to match your requirements - 255LPH or 450LPH for both return and returnless style systems
Specs:
| Application | Universal |
|---|---|
| Average Current Draw | 16.9Ampere |
| Average Flow Rating | 450Liters per Hour |
| Brand | Holley |
| Clearance Category | Air and Fuel Delivery |
| Connector Color | Black |
| Connector Gender | Male |
| Connector Quantity | 1 |
| Discount Percentage | 26-50% |
| Emission Code | 5 |
| Finish | Black |
| Free Flow LPH | 450 |
| Fuel Filter Included | Yes |
| Fuel Sending Unit Included | No |
| Fuel Tank Pressure Sensor Included | No |
| Fuel Type | E85, Gasoline |
| Gasket Or Seal Included | Yes |
| Gasket Or Seal Material | Foam |
| Grade Type | Performance |
| Height | Adjustable |
| Housing Material | Aluminum |
| In Tank or External | In Tank |
| Inlet Fitting Thread Size | 1/4Inch |
| Inlet Quantity | One |
| Inlet Size | 1/4 inch NPT |
| Inlet Type | NPT |
| Internal Or External Strainer | External |
| Lock Ring Included | No |
| Material | Die Cast Aluminum |
| Maximum Pressure | 60Pounds per Square Inch |
| Minimum Fuel Tank Depth | 7 inches |
| Mounting Hardware Included | Yes |
| Negative Ground | Yes |
| NPT Thread | 1/4 NPT |
| Outlet Fitting Thread Size | 1/4Inch |
| Outlet Quantity | One |
| Outlet Size | 1/4 inch NPT |
| Outlet Type | NPT |
| Product Type | Fuel Pump Module |
| Pump Type | Electric |
| Regulator Included | No |
| Sale Category | Air and Fuel Delivery |
| Top Mount Diameter | 5Inch |
| Universal Or Specific Fit | Universal |
| Voltage | 12Volts DC |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
| Wire Harness Included | Yes |
| Wire Quantity | 2 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 307 reviews
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Product Reviews
★★★★★ 5
Finally, a treat that lasts and doesn’t make your house a mess!
Color: 2PC-Bacon-Green, Color: 2PC-Bacon-Green
These are fun, nylon dog toys. They actually have a smell to them that is noticeable if you put your nose right up to it. Our dogs love, beef knuckles, and they make such a mess in our house that we needed an alternative. I am happy to report that these worked! They also have several knobs on them so the dogs can wrestle with them a little bit. The way they are shaped makes it very easy for the dogs to pick up especially when you have short nose dogs like we do. The price for these is much better than what you would pay in any store. I think these are a great bargain and a great way to treat your dog without wrecking your carpets! You can also throw it in the dishwasher if you want to. I definitely recommend!
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Reviewed in the United States on May 19, 2026
★★★★★ 3
Very hard
Color: 2PC-Bacon-Green
Extremely hard and heavy. So hard my dog couldn't even bite it. She can only play with it on the rug for fear she might chip or break the floor tiles.
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Reviewed in the United States on May 24, 2026
★★★★★ 4
As advertised and didn't splinter with gnawing!
Color: 2PC-Bacon-Green, Color: 2PC-Bacon-Green
This toy is definitely made for major dog toy-destroyers! The dog bones are made of a hard nylon/plastic that is very different from the standard dog toy. The toy is rigid, bumpy, and has knobs on both ends to simulate the bone shape. One of the dog toys, out of the box, had an odd black mark along one of the knobs. It did not wipe away and had a thin piece of plastic attached to it. I did cut that away to be safe, as I don't want to risk my dogs choking, even on something small. That, to me, looked like a factory default. Maybe from when it was being molded? It was only on the one, so its very possible that its just mine. Also worth noting that the toys did NOT smell strange or like plastic as many do. That was honestly pretty refreshing.
It does not exaggerate about its durability.
The material of the toy makes it so it cannot bend or break. I honestly think it would mess up my car tires before it would mess up the toy if I ran over it in the yard. That being said, my bigger dog did put teeth marks into it immediately. Like, the second he put it in his mouth. That isn't necessarily a bad thing, since you don't want them to chip a tooth, but it is something to make note of.
The gnaw marks did not splinter, as some durable chews tend to, which is an excellent sign of a long lasting toy. The second any of our toys splinter, we take them away as they can cause a choking hazard.
We have two bulldogs and they both have played with this style of hard toy before. The smaller bully, the old man, was disappointed by my present of the nylon chew. He sat at my feet pretty pathetically until I gave him an ice cube and sent him on his way. He usually enjoys the hard chews, but I think its possible he didn't like the size of this one. Though, it is surprising.
Our larger bulldog, the puppy, loved it immediately. He took it from my hand and ran off with it to gnaw on for probably an hour. Then came back to grab his brother's to gnaw on too!
For the price, I think its worth it, as you get two of them, and the lack of splintering is game changing.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Hana approved, gold star toy
Color: Original Pack, Color: Original Pack
This is, according to Amazon, our 11th set in 3 months. According to Hana, our shiba/chi mix, this toy is immaculate. Crunch score is a 10/10 and the squeak? Don't get her started. High pitched, easy to squeak and protected by just enough crunch and fabric that it actually lasts. In fact, she will tear the toy open before the squeaker gives up. This may seem like a small feat, however most toys last 12-30 minutes before the teefies take the squeaker out of commission. Lambchops last about 15 minutes before the squeaker gives in and fluff decorates the floor. The only reason we buy so many so often is because 1. The teefies do eventually puncture and the moment that happens she guts the poor Claw instantly. And 2. She has about 11 teefies, so the mouth gets kinda icky and due to the crunch, washing these kind of sucks- retains a lot of water and cant dry. So we replace them often even if she doesn't get to the gutting.
10/10. Its her favorite toy. And we've tested a lot of toys.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
These are ADORABLE!
Color: Tropical Pack, Color: Tropical Pack
These are adorable! I got them as a gift for my in-laws pups and when I was taking pics of them my dog now wants them soooo I’m going to order more for her! They are so soft and the details are hilarious! Just be careful because the pawcohol content is pretty high so I’m sure your dog will be feeling it after just one! 🤣🤣🤣🤣🤣
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Reviewed in the United States on December 17, 2025
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