Swapping an LS engine into a G Body (Monte Carlo, Cutlass, Malibu, Regal, etc.) is a popular upgrade, but choosing the right headers is critical for fitment and performance. We researched, compared, and evaluated the top options based on manufacturer specs, industry standards, and aggregated owner feedback. Our guide covers full-length, shorty, and mid-length headers to help you find the best match for your chassis and budget.
| Photo | Product | Score | Buy |
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Hooker Blackheart 8501 Best Overall 1 7/8 inch primary, 3 inch collector, 304 stainless steel |
9.0 | 🛒 Check Price |
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Speed Engineering G Body LS Swap Headers Best Value 1 3/4 inch primary, 3 inch collector, mild steel with ceramic coating |
8.4 | 🛒 Check Price |
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Hedman Hedders 65130 Best Full-Length 1 3/4 inch primary, 3 inch collector, mild steel with silver paint |
8.1 | 🛒 Check Price |
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Stainless Works LS Swap G Body Headers Premium Choice 1 7/8 inch primary, 3 inch collector, 304 stainless steel |
9.2 | 🛒 Check Price |
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Pacesetter 70-2260 Budget Pick 1 5/8 inch primary, 2.5 inch collector, mild steel with black paint |
7.5 | 🛒 Check Price |
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Dynatech LS Swap G Body Headers Best Mid-Length 1 3/4 inch primary, 3 inch collector, 304 stainless steel |
8.7 | 🛒 Check Price |
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Texas Speed 304 Stainless G Body Headers Runner Up 1 7/8 inch primary, 3 inch collector, 304 stainless steel |
8.8 | 🛒 Check Price |
1. Hooker Blackheart 8501: Best Overall
In our evaluation, the Hooker Blackheart 8501 stands out as the top choice for G Body LS swaps. Built from 304 stainless steel with 1 7/8 inch primaries and a 3 inch collector, these headers are designed to clear aftermarket crossmembers and steering shafts common in LS swaps. Owner feedback consistently praises the fitment and performance gains, especially on mild to moderately built LS engines.
However, these headers come at a premium cost, which may not suit budget builds. They also require an aftermarket crossmember for proper installation, so check your chassis setup before purchasing. If you want a hassle-free, high-performance header and are willing to invest, the Hooker Blackheart is hard to beat.
- Designed specifically for G Body LS swaps with aftermarket crossmembers
- Excellent ground clearance and steering shaft clearance
- Includes all hardware and gaskets for direct fitment
Pros: Proven fitment on most G Body chassis; High-quality stainless steel construction
Cons: Premium price point
2. Speed Engineering G Body LS Swap Headers: Best Value
For budget-conscious builders, the Speed Engineering G Body LS swap headers deliver solid performance without breaking the bank. Made from mild steel with a ceramic coating, these headers feature 1 3/4 inch primaries and a 3 inch collector, suitable for stock to mildly modified LS engines. Based on owner feedback, they provide a noticeable power improvement and decent fitment for most G Body swaps.
The main trade-off is durability: the mild steel construction is prone to rust if the ceramic coating gets damaged. Some owners reported needing to massage the tubes for steering shaft clearance on certain chassis. If you are on a tight budget and can handle minor tweaks, these are a smart choice.
- Affordable option with good performance for stock to mild LS engines
- Ceramic coating helps reduce underhood temperatures
- Includes gaskets and hardware
Pros: Great value for the price; Ceramic coating included
Cons: Mild steel can rust if coating chips; Fitment may require minor adjustments on some chassis
3. Hedman Hedders 65130: Best Full-Length
The Hedman Hedders 65130 are a traditional full-length header option for LS swapped G Bodies. With 1 3/4 inch primaries and a 3 inch collector, they are designed to optimize exhaust flow for mid-range torque and top-end power. Our research indicates they fit well with aftermarket engine mounts and a crossmember, though some owners noted tight clearance near the steering shaft.
The silver painted finish is a weak point: it can burn off or rust if not properly cured or if the engine bay sees moisture. These headers are best for builders who prioritize performance over longevity and are willing to repaint or wrap them. If you want a durable finish, consider ceramic coating after purchase.
- Full-length design for maximum scavenging
- Fits G Body with aftermarket engine mounts and crossmember
- Affordable price for a full-length set
Pros: Good performance from full-length design; Budget-friendly
Cons: Paint finish may not last long; Fitment requires careful measurement
4. Stainless Works LS Swap G Body Headers: Premium Choice
If budget is no object, the Stainless Works LS swap headers are the pinnacle of quality. Crafted from 304 stainless steel with 1 7/8 inch primaries and a 3 inch collector, they are built to handle high-horsepower LS engines while resisting corrosion. Our evaluation of owner feedback shows nearly universal praise for the fitment, with no steering or frame clearance issues on most G Body chassis.
The main drawback is the price, which is significantly higher than other options. Additionally, some users reported that the headers are designed for specific aftermarket crossmembers; verify compatibility before purchase. For serious builders aiming for 500+ horsepower, these headers are a worthwhile investment.
- High-end 304 stainless steel for corrosion resistance and longevity
- Precision fitment with excellent ground and steering clearance
- Designed for high-horsepower LS builds
Pros: Exceptional build quality and fit; Great for high-performance engines
Cons: Very expensive; May not fit all aftermarket crossmembers without modifications
5. Pacesetter 70-2260: Budget Pick
The Pacesetter 70-2260 is the most budget-friendly header in our guide, making it accessible for builders on a tight budget. With 1 5/8 inch primaries and a 2.5 inch collector, these headers are best suited for stock LS engines or mild builds where low-end torque is prioritized. They are compact and fit well in tight engine bays, though some owners reported minor clearance issues with aftermarket steering shafts.
The main limitations are the small primary size, which restricts high-rpm power, and the black paint finish that can deteriorate quickly under heat. These headers are a good entry-level option but should be upgraded if you plan to add forced induction or build a high-horsepower engine. If you need maximum performance, look elsewhere.
- Lowest cost option for LS swap headers
- Compact design for tight engine bays
- Includes gaskets and hardware
Pros: Extremely affordable; Small primaries help low-end torque
Cons: Small primaries limit top-end power; Paint finish may peel quickly
6. Dynatech LS Swap G Body Headers: Best Mid-Length
The Dynatech LS swap headers offer a mid-length design that aims to combine the low-end torque of shorties with the top-end flow of full-length headers. Made from 304 stainless steel with 1 3/4 inch primaries and a 3 inch collector, they are a premium alternative to the Hooker Blackheart. Owners report excellent fitment on most G Body chassis with aftermarket crossmembers, and the polished finish adds visual appeal.
The price is higher than some competitors, but still lower than full-length stainless options. Some users noted that the headers may require modifications to fit certain transmission crossmember configurations. If you want a high-quality mid-length option and are willing to pay for it, Dynatech is a strong contender.
- Mid-length design for a balance of torque and top-end power
- High-quality stainless steel with polished finish
- Direct fit for G Body with aftermarket crossmembers
Pros: Excellent build quality and appearance; Good balance of power characteristics
Cons: Higher cost than some mid-range options; May not fit all transmission crossmember setups
7. Texas Speed 304 Stainless G Body Headers: Runner Up
Texas Speed is well-known in the LS community, and their G Body headers live up to the reputation. Featuring 1 7/8 inch primaries and a 3 inch collector in 304 stainless steel, these headers are designed for maximum flow. In our research, owners consistently report significant power gains, especially on modified LS engines. The TIG-welded construction ensures long-term durability.
However, some users experienced tight clearance near the steering shaft or frame, requiring minor adjustments. The price is also higher than average, though still competitive with other premium brands. If you want a proven performer and are prepared for potential fitment tweaks, Texas Speed headers are an excellent choice.
- Designed for high-performance LS swaps with great flow
- TIG-welded construction for durability
- Comes with gaskets, bolts, and reducer pipes
Pros: Strong performance gains; Stainless steel resists corrosion
Cons: Fitment can be tight on some chassis; Price is on the higher side
Frequently Asked Questions
What size headers should I choose for my G Body LS swap?
For most stock to mild LS engines (up to 450 hp), 1 3/4 inch primaries are sufficient. For high-horsepower builds (450+ hp), 1 7/8 inch primaries are recommended to reduce backpressure and maximize top-end power. Collector size should be at least 3 inches for better flow.
Will these headers fit my G Body with a stock crossmember?
Most aftermarket headers require an aftermarket crossmember for proper clearance. Some headers like the Speed Engineering and Pacesetter may fit with stock crossmembers but often require modifications. We recommend using an aftermarket crossmember designed for LS swaps to ensure fitment.
Do I need to modify the steering shaft for header clearance?
In many G Body LS swaps, the steering shaft can interfere with the headers. Some headers are designed to clear the stock shaft, but others may require a steering shaft modification or a different shaft. Check the manufacturer’s fitment notes before purchasing.
Are ceramic-coated headers better than stainless steel?
Ceramic-coated mild steel headers offer good heat management and are more affordable than stainless steel, but they can rust if the coating is damaged. Stainless steel headers are more durable and corrosion-resistant but are heavier and more expensive. For longevity, stainless steel is better; for cost, ceramic-coated is a good compromise.
What gaskets should I use with LS swap headers?
We recommend using high-quality metal or multi-layer steel (MLS) gaskets designed for LS engines. Many headers come with gaskets, but aftermarket options like GM MLS gaskets or Remflex gaskets provide better sealing, especially on uneven surfaces.
Our Verdict
After researching and comparing the top options, the Hooker Blackheart 8501 stands out as the best overall G Body LS swap header for its excellent fitment, performance, and build quality. For those seeking a more affordable option, the Speed Engineering G Body LS swap headers offer great value. If budget allows, the Stainless Works headers are the premium choice for high-horsepower builds.
Last reviewed and spec-checked: January 10, 2026. We re-check our picks and listings periodically.
