Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. FLASHARK offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed.
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Model: EH28938
Primary Diameter: 1-5/8 in.
Collector Diameter: 2-1/2 in.
Head Flange Thickness3/8 in. (9.5mm)
Pipe Thickness: 16 gauge (1.5mm)
Gains over 18+ rwhp
V8 Engines Only
4.8L, 5.3L, 5.7L, 6.0L, 6.2L Engines
Exhaust Header VS Manifold, which is the better choice?
The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.
Fitment & Compatibility
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Chevrolet | S10 | 1982-2004 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| Chevrolet | S10 Blazer | 1983-1994 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| Chevrolet | Blazer | 1995-2005 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| GMC | Sonoma | 1991-2004 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| GMC | S15 | 1982~1990 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| GMC | S15 Jimmy | 1983~1991 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| GMC | Jimmy | 1992-2005 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
| Oldsmobile | Bravada | 1991-1994, 1996-2001 | V8; 4.8L, 5.3L, 5.7L, 6.0L, 6.2L |
Q1: Will these headers fit my 2WD Chevy S10 LS swap project?
A1: Yes, these Flashark LS swap headers are specifically engineered for 1982-2004 Chevy S10 and GMC S15 2WD trucks and Blazers. They are designed to clear the frame rails and steering components common in these specific LS conversion projects, making them a top choice for S10 LS1/LS2/LS3 swaps.
Q2: Which LS engine series are compatible with these swap headers?
A2: These headers are highly versatile and compatible with all LS-series engines, including LS1, LS2, LS3, LS6, and LS7. They also fit GM Vortec truck engines such as the 4.8L, 5.3L, 6.0L, and 6.2L (L33, L59, LM7, LR4, LQ4, LQ9), providing a perfect exhaust solution for almost any LS truck swap.
Q3: Do these headers provide enough clearance for the steering shaft?
A3: One of the biggest challenges in an S10 LS swap is steering shaft clearance. Our headers feature a tight-to-block "shorty" design that is specifically contoured to provide maximum clearance for the steering shaft and spark plug wires, reducing the need for aggressive frame or shaft modifications.
Q4: What material are the Flashark LS swap headers made of?
A4: Durability is key for high-performance swaps. These headers are constructed from high-quality T-304 Stainless Steel with TIG-welded CNC machine flanges. This ensures superior resistance to rust and corrosion while maintaining structural integrity under the high heat cycles of a performance LS engine.
Q5: How much horsepower gain can I expect after installing these headers?
A5: By replacing restrictive factory manifolds with our high-flow 1.5" primary tubes and 2.5" collectors, you can typically expect an instant gain of 10-15 horsepower and significantly improved torque. The 4-to-1 header design optimizes exhaust scavenging for better throttle response across the RPM range.
Q6: Are these headers compatible with angled or straight spark plug boots?
A6: These headers are designed with spark plug access in mind. While they work with many standard setups, we recommend using 45-degree or 90-degree spark plug boots and high-quality heat sleeves to ensure maximum clearance and protection against heat-related wire failure in the tight S10 engine bay.
Q7: What is included in the Flashark LS swap header kit?
A7: Each kit comes fully equipped for installation, including a pair of stainless steel exhaust headers (driver and passenger side), high-temperature manifold gaskets, collector gaskets, and all necessary mounting bolts. You won't need to hunt for extra hardware to get the job done.
Q8: Do these headers require any cutting or welding for installation?
A8: These are designed as a "bolt-on" solution for the engine side. However, because every LS swap is unique (due to different engine mounts and transmission crossmembers), some custom exhaust piping will be required from the collector back to connect to your specific mufflers or tailpipes.
Q9: Can I use these headers on a 4WD S10 or Blazer?
A9: These specific headers are optimized for 2WD (RWD) models. On 4WD models, the front differential and drive shaft often interfere with the header routing. For 4WD LS swaps, we recommend checking our universal block-hugger series or specific 4WD conversion kits.
Q10: Will these headers fit with my stock AC evaporator box?
A10: In many S10 LS swaps, the factory AC box can be a tight fit. Our headers are designed to be as compact as possible; however, depending on which engine mounts you use (forward or rearward bias), some minor trimming or heat shielding of the AC box may be necessary for safety.
Q11: What is the flange thickness of the Flashark LS swap headers?
A11: We use heavy-duty 3/8" (approx. 10mm) thick CNC machined flanges. This thickness is critical in preventing warping and ensuring a leak-free seal against the cylinder head, even under extreme racing or towing conditions.
Q12: Do I need to use an O2 sensor with these headers?
A12: To maintain proper fuel trims and engine performance in an EFI LS swap, O2 sensors are required. While the headers themselves do not always include pre-installed bungs (to allow you to place them perfectly for your specific exhaust routing), bungs can be easily welded onto the 2.5" collectors or the following downpipes.