Chevy/GMC 350 (5.7L) & 305 (5.0L) SBC Long Tube Headers
These Flashark long tube headers are built for select 1988-1997 Chevy and GMC trucks running the 5.0L 305 or 5.7L 350 small block Chevy V8. If your old factory manifolds are cracked, restrictive, or choking the exhaust note, this kit gives your SBC truck a cleaner exhaust path, a stronger V8 tone, and a stainless upgrade that looks right under the hood.
The main fitment target is the Chevy/GMC C/K truck platform, including many C1500, C2500, K1500, and K2500 applications. Because these trucks changed across years, drivetrains, and exhaust layouts, check the fitment table and the “Before You Buy” notes before ordering.
Specifications
| Brand | Flashark |
| Application | Long tube exhaust headers |
| Engine Fitment | 5.0L 305 / 5.7L 350 Small Block Chevy V8 |
| Material | T304 stainless steel |
| Surface Finish | Mirror polished stainless finish |
| Primary Tube / Inlet Size | 1.5 in. |
| Collector / Outlet Size | 3.0 in. |
| Flange Type | 3-bolt collector flange |
| O2 Sensor Location | 1 O2 sensor location |
| Included Hardware | Headers, reducers, bolts, and metal gaskets |
| Model | EH28022 |
Why Upgrade from Stock Manifolds?
Factory cast manifolds are durable, but they are not great at moving exhaust quickly on a small block truck. A long tube header uses longer primary tubes to help exhaust pulses leave the cylinder more efficiently. On a 305 or 350 SBC truck, that can improve throttle response, sharpen the exhaust note, and support better breathing when paired with the right exhaust system.
Real-world gains depend on the engine condition, camshaft, tune, exhaust size, catalytic converter setup, and how the truck is driven. A stock daily driver will not respond the same way as a tuned small block with a freer-flowing exhaust. Think of headers as part of the full exhaust system, not a magic bolt-on by themselves.
What You Get
- Long tube design: built to reduce restriction compared with many stock manifold setups.
- T304 stainless steel: stronger corrosion resistance than mild steel headers.
- 1.5-inch primaries: a street-friendly size for 305 and 350 small block truck applications.
- 3-inch collectors: provides room for a freer-flowing exhaust path after the header.
- Included install hardware: reducers, bolts, and metal gaskets are included.
- Polished finish: gives the engine bay a cleaner performance look.
Mechanic’s Note
Long tube headers usually require more fitment checking than shorty headers. Before tightening everything down, mock up both sides, check the collector angle, inspect steering shaft and front driveline clearance, and make sure spark plug wires are kept away from hot tubes.
TBI vs Vortec Fitment Note
This header kit is designed for select Chevy/GMC 305 and 350 small block truck applications, including compatible TBI-style trucks and listed 5.7L Vortec applications. Before ordering, match your truck’s year, model, engine size, and drivetrain with the fitment table on this page.
For 1988-1995 TBI-style 305/350 trucks, fitment should be checked against the listed C/K truck applications. For 1996-1997 5.7L Vortec trucks, please verify your exact vehicle configuration before purchase, especially if the truck has an engine swap, lift kit, lowered suspension, or aftermarket exhaust setup.
Compare Long Tube Headers vs Stock Manifolds
| Part | Best For | Main Tradeoff |
|---|---|---|
| Stock cast manifolds | Quiet daily driving and factory-style replacement | More restrictive exhaust flow |
| Shorty headers | Easier packaging and simpler exhaust connection | Usually less scavenging benefit than long tubes |
| Long tube headers | Better exhaust flow, stronger sound, and performance-oriented SBC builds | Requires more clearance checks and possible exhaust modification |
Why Upgrade Your Chevy 350/Vortec Exhaust?
- Stock vs. Long Tube: Stock manifolds on the C/K 1500 are restrictive. Flashark Chevy 350 &305 long tube headers provide a smoother path for exhaust gases, scavenging the cylinders more effectively.
- Vortec Compatibility: Owners of 1996+ trucks searching for long tube headers for 5.0 & 5.7 vortec often struggle with fitment. Our headers are designed to clear the chassis of 88-97 trucks specifically.
Shipping, Warranty & Customer Support
- Estimated Delivery: Most orders are delivered within 7-9 business days after shipment, depending on warehouse availability and destination.
- 1-Year Warranty: This product is backed by a 1-year warranty against manufacturing defects.
- Returns & Fitment Support: Please confirm your vehicle year, model, engine, and drivetrain before ordering. If you are unsure about fitment, contact customer support before purchase.
- Customer Support: Our support team can help with basic fitment questions, order issues, and warranty-related support.
Fitment & Compatibility
Use this table as the starting point before ordering. These headers are intended for select Chevy/GMC 5.0L 305 and 5.7L 350 SBC truck applications. For swapped trucks, lifted trucks, lowered trucks, custom exhausts, or vehicles with previous exhaust modifications, additional fabrication may be required.
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Chevrolet | C1500 | 1988-1996 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| Chevrolet | C2500 | 1988-1995 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| Chevrolet | K1500 | 1988-1992 / 1994-1995 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| Chevrolet | K2500 | 1988-1994 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| Chevrolet | Blazer | 1992 | 5.0L/5.7L SBC Vortec/TBI Engine |
| Chevrolet | Tahoe | 1995 | 5.0L/5.7L SBC Vortec/TBI Engine |
| GMC | C1500 | 1988-1997 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| GMC | C2500 | 1988-1995 | 5.0L/5.7L SBC Vortec/TBI Engine, 2WD |
| GMC | K1500/K2500 | 1988-1995 | 5.0L/5.7L SBC Vortec/TBI Engine, 4WD |
Before You Buy: Confirm Your Fitment
- Confirm your truck is a compatible 1988-1997 Chevy/GMC application listed in the fitment table.
- Confirm your engine is a 5.0L 305 or 5.7L 350 small block Chevy V8.
- Confirm your vehicle model, including C1500, C2500, K1500, K2500, Tahoe, Blazer, or Yukon where listed.
- Confirm whether your truck uses a TBI or Vortec-style setup based on your model year and engine configuration.
- For engine-swapped or heavily modified trucks, please verify compatibility before ordering.
Q1: Will these headers fit a Chevy 350 small block?
A1: Yes, these headers are engineered for compatible Chevy/GMC truck 305/350 SBC applications. Before ordering, please verify your vehicle’s year, model, engine size, and drivetrain match the fitment table.
Q2: Will these headers fit a 305?
A2: Yes, the kit is also intended for compatible 5.0L 305 SBC truck applications listed in the fitment table.
Q3: Are these long tube headers or shorty headers?
A3: These are long tube headers. They are designed for improved exhaust flow compared with many factory manifold setups, but they require more fitment checking than shorty headers.
Q4: Will these fit a 1996 Chevy C1500 5.7 Vortec?
A4: The listed fitment includes Chevrolet C1500 applications through 1996 with 5.0L/5.7L SBC engines. For a 1996 5.7 Vortec truck, confirm chassis layout, O2 sensor position, and exhaust routing before ordering.
Q5: Will these fit a 1997 GMC C1500?
A5: The listed fitment includes GMC C1500 applications through 1997 with 5.0L/5.7L SBC engines. Confirm the engine, drivetrain, and exhaust layout before installation.
Q6: Will these fit a 1998 Chevy or GMC truck?
A6: This product page is focused on select 1988-1997 applications. A 1998 truck should not be assumed to fit without checking the exact model, engine, chassis, and exhaust layout.
Q7: Are these headers for 2WD or 4WD trucks?
A7: The fitment list includes C-series 2WD trucks and select K-series 4WD trucks. K-series applications need extra clearance checks around the front driveline, frame, and collector area.
Q8: Do I need to modify my exhaust?
A8: Most customers install these headers with standard exhaust connections after the collector. If your truck has aftermarket or custom exhaust components, confirm fitment and alignment before installation.
Q9: What size are the collectors?
A9: The headers use 3.0-inch outlets with 3-bolt collector flanges.
Q10: Are gaskets and reducers included?
A10: Yes. The kit includes reducers, bolts, and metal gaskets.
Q11: How much horsepower will these headers add?
A11: Power gains vary by engine condition, tune, camshaft, exhaust setup, and vehicle configuration. These headers are mainly designed to reduce exhaust restriction and support better flow on compatible 305/350 SBC truck applications.
Q12: Are these legal for street use?
A12: Emissions rules vary by state and vehicle use. Check your local laws and inspection requirements before installing long tube headers on an emissions-controlled street vehicle.