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Description
Holley Hi-Ram EFI Intake Manifold Kit - Big Block Chevy 300-964Hi Ram intake manifold with 2x4 4150 plenum top. A 10AN fuel rail kit is included 300 964. Holley Hi Ram EFI intake manifolds are now available for 1965 & later 396 502+ MKIV MKVI Big Block Chevy engines with standard intake flange rectangle port cylinder heads. Traditional Big Block Chevy engines can now also be fitted with the Holley Brand Hi Ram type EFI intake manifolds that have so well served GM LS & LT, Gen 3 Hemi, SBF Ford, and Ford Coyote
Hi-Ram intake manifold with 2x4 4150 plenum top. A -10AN fuel rail kit is included - 300-964.
Holley Hi-Ram EFI intake manifolds are now available for 1965 & later 396-502+ MKIV-MKVI Big Block Chevy engines with standard intake flange rectangle-port cylinder heads. Traditional Big Block Chevy engines can now also be fitted with the Holley Brand Hi-Ram type EFI intake manifolds that have so well served GM LS & LT, Gen 3 Hemi, SBF Ford, and Ford Coyote engine platforms. The iconic Chevy SBC & BBC platforms are primed for 21st century induction systems, Holley EFI engine management, and Holley fuel systems.
Features:
- The coolant outlet is a standard Chevy thermostat housing flange. and (2) 1/2 NPT and (1) 3/8 NPT coolant ports are provided.
- Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish
- Power Band: 1500-8000 RPM
- Plenum Top Gasket Type – 3/32” Round O-ring Cord
- 2.40” tall x 1.60” wide port flange openings, uses Mr. Gasket intake manifold gasket Part Number 5817
- Uses drive by wire or cable actuated GM Gen IV LS 4-bolt throttle bodies
- Black anodized EFI fuel rails are machined for -10AN O-ring fittings and come included with these EFI Hi-Ram kits.
- Hi-Ram intake manifolds are a cost-effective alternative to fabricated sheet-metal or billet manifolds for high-performance applications where induction system height is not limited
- Throttle Cable Bracket is supplied in the kit
- The Big Block Chevy Hi-Ram manifold is available in either a traditional Hi-Ram 105mm plenum top or with a 2 x 4150 4-barrel throttle body plenum top options
- Requires the use of early type GM or small cap MSD or Holley Distributors. Not compatible with HEI distributors
- MAP sensor port is for a GM Gen IV LS MAP sensor, manifold also has provisions for (1) 1/8 NPT, (1) 1/4 NPT, (1) 3/8 NPT fittings to the plenum
- 300-961, 300-963, and 300-964 are designed for 1965 & later 396-502+ MKIV-MKVI standard 9.80” deck height Big Block Chevy engines with standard intake flange rectangle-port cylinder heads.
Applications:
- Big Block Chevy Engines (1965 and later MKIV, MKV, MKVI)
- 6.0L V8 366 CID
- 6.5L V8 396 CID
- 6.6L V8 402 CID
- 7.0L V8 427 CID
- 7.4L V8 454 CID
Specs:
| Basic Operating RPM Range | 1500-8000 |
|---|---|
| Brand | Holley |
| Carburetor Flange | Square/4150 |
| Carburetor Quantity | 2 |
| Carburetor Studs Included | No |
| Category | Intake Manifolds |
| CNC Ported | No |
| Color | Natural |
| Construction | Cast |
| Cylinder Head Port Shape | Rectangle |
| Deck Height | 9.8 in |
| EGR Port | No |
| Emission Code | 3 |
| Engine | Chevy Big Block V8 |
| Finish | Natural Cast |
| Fuel Injectors Included | No |
| Fuel Rail(s) Included | Yes |
| Fuel System Type | EFI |
| Gasket Or Seal Included | Yes |
| Grade Type | Performance |
| Intake Port Gasket(s) Included | No |
| Manifold Type | Hi-Ram |
| Material | Aluminum |
| Nitrous Bung(s) Included | No |
| Plenum Finish | Natural |
| Product Type | Intake Manifold |
| Removable Runners | No |
| Removable Top/Lid | Yes |
| RPM Power Band | 1500-8000 |
| Single Or Dual Plane Type | Single Plane |
| Throttle Body Bore Diameter | 3.6 |
| Throttle Body Gasket Included | No |
| Throttle Body Included | No |
| Vacuum Ports | Yes |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
| Part Number | 300-964 |
Emissions:
- This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.
- The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
- WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
- The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
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
4.6 ★★★★★
Based on 1363 reviews
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Product Reviews
★★★★★ 3
3.5 Stars -- Sturdy but Limited
Color: Purple, Size: Large (Pack of 1)
I got the Barnacle toy in size Large for my ~45 lb mutt. She enjoys food toys, and I wanted to find one sturdy enough that I felt safe leaving her with when I left for work since she tends to destroy her toys quickly.
First thing -- there's no way any dog is going to be able to destroy this. The "rubber" is super thick and a good balance of flexible and sturdy, so she can't do her favorite "pick at a weak edge and slowly disembowel it" trick. I've had it for a couple months now and it looks brand new.
However, it isn't great for feeding her kibble. She eats 1 cup at morning and at night, and none of the compartments fits that comfortably. I don't really feel like dividing her food into 3 portions every day to split it between either. The bigger problem is the hole size, or rather the ratio of kibble-to-hole size. The holes are very big with rubber "fingers" inside to slow the food spill. I've still found that it tends to dump a fistful of kibble all at once, or not let anything go for a long time. This may have to do with my dog's "technique", as described below.
Another problem is that since this has three separate chambers, this toy is not hollow and is surprisingly heavy. While my dog has no problems throwing a kong around (and I mean THROWING a kong around), the weight and asymmetrical shape makes it difficult to throw or roll, which is my dog's preferred way to use a food toy. This toy works best when a dog slaps it with her paws or picks it up and drops it, which may be why my dog gets frustrated with getting her food from it.
What this toy is really great for, for us, is high value treats. If I am leaving at an unusual time and anticipate that she's going to fuss, I can put "the good stuff" in this toy and then she doesn't mind the struggle at all! The different size chambers make this especially nice if I'm breaking up odd sized or home made treats and want her to stay busy for a while. Since it's so sturdy, she can chew on it all she wants, but she has to do the work to get the treats.
All in all-- this toy isn't great for my dog's daily feedings, but it's great for high value treats and a change of pace.
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Reviewed in the United States on March 2, 2015
★★★★★ 5
Actually a challenge for my genius dog!
Color: Purple, Size: Large (Pack of 1)
I am pretty sure my dog owns every puzzle toy and treat-dispensing dog toy that exists, and he's able to figure most of them out in less than 5 minutes. Many last no more than 60 seconds before he's solved them.
The Barncle, however, is actually a challenge for him!
The Barnacle has three "compartments, " none of which are connected. All three have a rubber "mouth" that helps keep treats inside. The rubber "mouth parts" are very effective and make it quite challenging to get treats out once they've been placed inside. You can trim the rubber "mouth parts" to make it easier to let treats out, but I'm not doing that. I'm glad that it's not challenge!
The Barnacle keeps my dog occupied for at least 30 minutes, which is a LONG time for my dog who usually has a "What next?" attitude towards toys.
Th only "bad" thing about the Barnacle is that it's so hard to get treats out of, even for humans. Therefore, it could attract vermin if you're not careful to clean it out.
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Reviewed in the United States on May 20, 2025
★★★★★ 1
OMG - DO NOT BUY - it smells like noxious poison.
Color: Purple, Size: Medium (Pack of 1), Color: Purple, Size: Medium (Pack of 1)
OMG DO NOT BUY!!!!!!!!!!! I didn’t think the reviews stating the noxious smell could be accurate - OMG OUR WHOLE HOUSE REEKS OF POISON. I LITERALLY FEEL LIKE I MAY BE SICK. OMG OMG OMG.
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Reviewed in the United States on April 11, 2026
★★★★★ 5
Great toy for dispensing dinner!
Color: Purple, Size: Large (Pack of 1)
This is one of my puppy's favorite toys! We always try to use toys to dispense his meals, but many of them become too easy for him. Kongs take no time at all to empty. This one seems to provide much more of a challenge, mostly due to the three different sizes of compartments and openings. He'll empty the largest compartment fairly quickly, but the small one almost always has a piece or two of kibble that he just can't get out. This helps to keep him interested in the toy throughout the day.
We use a large breed dog food with larger sized kibble which helps to add to the challenge. The fact that this bounces erratically and doesn't roll smoothly makes it difficult for my dog to develop a method for emptying it quickly. With some other toys, like the Kong Wobbler, he quickly learns to just push it around with his nose. This toy makes him work much harder!
The construction of this toy is very sturdy. We usually feed one meal a day in this, and it's held up well to heavy chewing. I (and my roommates) appreciate that it's made of softer plastic which doesn't make as much noise on the hardwood floors as some of his other toys. The prongs on the openings can be cut to adjust the difficulty, which is nice if you're using different sized kibble or treats. It is a little harder to fill than other toys, but still not terribly difficult.
Overall I've had a great experience with all the PetSafe toys I've tried, and this one is one of the very best!
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Reviewed in the United States on January 11, 2015
★★★★★ 5
Great chew toys!
Color: Purple, Size: Medium (Pack of 1), Color: Purple, Size: Medium (Pack of 1)
Keenan LOVES this toy! He will play with it all day. Running around the house, chasing as it bounces in different directions. And he'll be so content chewing on it for long periods of time. It makes an annoying sound when he chews, but I can live with it if it's keeping him entertained. This is the second purple rubber toy from this brand that I've purchased, the other being the squirrel one, which was his favorite until I purchased this for Christmas. They are super durable, his squirrel is still going strong. Even without putting food/treats inside, these are great toys for dogs that enjoy the softer rubber type chew toys. My only con is that it's a little big for him. He weighs 70lbs and I got the medium. It's fine but he has a hard time carrying it because of its size/shape, and he can't catch it when I toss it to him. Think I'm gonna buy the small size to see if it's any better.
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Reviewed in the United States on January 10, 2021