Description
Summit Racing™ Chevy LS 5.3L 450HP Long Block Crate Engine – SUM-150153
Unleash impressive power and LS performance with the Summit Racing™ 5.3L 450HP Long Block Crate Engine, part number SUM-150153. Built for enthusiasts who demand big horsepower on a budget, this LS-based crate engine offers 450 HP in a compact and reliable package—ideal for hot rods, swaps, or daily driven street machines.
Key Features:
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Displacement: 5.3L (325 cu. in.)
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Horsepower: 450 HP
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Torque: Approx. 420 ft-lbs (estimated)
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Block Material: Cast iron Gen III/IV LS base
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Cylinder Heads: Aluminum, cathedral port
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Camshaft: Hydraulic roller performance cam for added power across RPMs
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Compression Ratio: 10.0:1 (approximate)
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Oil Pan: Included (rear sump)
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Timing Cover, Valve Covers, Harmonic Balancer: Included
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Fuel System Compatibility: EFI or Carb-ready (requires intake setup)
Built For Versatility
Whether you’re building a restomod, upgrading your track-day weapon, or doing an LS swap, this crate engine offers serious performance potential without breaking the bank.
Why Choose This Engine:
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Trusted Summit Racing™ quality and parts selection
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Built to handle aftermarket upgrades and power adders
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Budget-friendly entry into the LS swap world
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Assembled with name-brand internal components for reliability
What’s Included:
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Fully assembled long block
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Aluminum cylinder heads installed
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Valve train components
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Oil pan and front cover
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Harmonic balancer and rear cover
Frequently Asked Questions (FAQ)
Q: What vehicles can I use this in?
A: Any project that supports LS engine swaps. Common fits include older GM muscle cars, trucks, hot rods, and restomods.
Q: Does it include a warranty?
A: Yes. Summit Racing™ offers a limited warranty—check product details at SummitRacing.com for terms.
Q: Can I run boost on this engine?
A: Yes—with proper tuning and supporting mods, this engine can support forced induction setups like superchargers or turbos.
Related Links:
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[Compare with BluePrint LS Crate Engines]
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[LS Crate Engine Installation Guide]
LS 5.3L Crate Engine Comparison Chart
| Feature / Model | Summit Racing™ SUM-150153 | BluePrint 5.3L LS Crate Engine | ATK HP73C LS 5.3L Crate Engine |
|---|---|---|---|
| Horsepower | 450 HP | 430–460 HP | 420–450 HP |
| Torque (Est.) | ~420 lb-ft | ~450 lb-ft | ~440 lb-ft |
| Displacement | 5.3L / 325 cu in | 5.3L / 325 cu in | 5.3L / 325 cu in |
| Compression Ratio | ~10.0:1 | 10.0:1 | 9.5:1 |
| Block Material | Cast Iron | Cast Iron | Cast Iron |
| Cylinder Heads | Aluminum Cathedral Port | Aluminum Cathedral Port | Aluminum Cathedral Port |
| Camshaft | Performance Hydraulic Roller | Hydraulic Roller | Mild Performance Roller Cam |
| Fuel Delivery Compatibility | EFI or Carb-Ready | EFI | EFI |
| Oil Pan Included | Yes (Rear Sump) | Yes | Yes |
| Harmonic Balancer Included | Yes | Yes | Yes |
| Computer / Harness Included | No | Optional | No |
| Supercharger Ready? | Yes (with proper tuning) | Yes (some models prepped) | Yes |
| Warranty | Limited Warranty via Summit | 30-Month / 50,000 Mile Warranty | 12-Month Unlimited Miles |
| Ideal For | Budget LS Swaps, Street Rods | LS Swaps, Muscle Cars | Trucks, Muscle Cars |
| Price Range (Est.) | $4,000 – $4,700 | $4,500 – $5,200 | $4,300 – $4,900 |
_Summary Recommendations
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Choose Summit Racing™ SUM-150153 if you want a reliable, no-frills 450HP LS crate engine at a great price, ready for EFI or carb setups.
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Choose BluePrint if you want a longer warranty and dyno-tested performance with great streetability.
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Choose ATK if you’re looking for a torque-focused 5.3L engine, especially for trucks or daily-driven swaps.
