AMVirtuo Long Tube Headers for 1966-1987 Chevy GMC Blazer Suburban C10 C20 C30 K10 K20 K30 Trucks, 283-400 cu.in. Small Block V8
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Fitment and Compliance Notice: Professional installation is recommended. Verify vehicle fitment, clearance, exhaust requirements, and local regulations before purchase.
Key Features
Small Block Chevy V8 Compatibility
These SBC headers are engineered for 283-400 cu. in. Small Block Chevy V8 engines, delivering precise fitment for classic Chevy and GMC trucks from 1966-1987. Compatible with both 2WD and 4WD configurations, including C10, K10, C20, K20, C30, K30 series trucks, Blazer, Jimmy, and Suburban models.
Full-Length Performance Design
Featuring full-length mandrel-bent tubing with precision-engineered curves, these long tube headers minimise exhaust backpressure for improved exhaust scavenging efficiency. The optimised design delivers potential improvements in throttle response and low-end torque, especially when paired with performance exhaust systems.
Premium T304 Stainless Steel Construction
Crafted from high-quality T304 stainless steel with a polished chrome finish, these Chevy truck headers deliver exceptional durability and corrosion resistance. The robust 5/16" laser-cut head flanges prevent cracking or warping, ensuring a leak-free seal for years to come.
TIG-Welded Durability
Each set features precision multi-pass TIG welding throughout, creating wear-resistant and crack-proof joints that withstand 1,600°F continuous exhaust temperatures. The reinforced collector joints prevent cracking under extreme heat and vibration, ensuring long-term durability for high-performance engines.
Complete Installation Kit
Includes all mounting hardware for Designed fitment. Professional shop installation is recommended for optimal alignment and sealing. Note: To prevent clearance issues, use short-thread spark plugs and plug wire heat shields—standard plugs may require modifications.
Description
Transform your classic Chevy or GMC truck with AMVirtuo long tube headers, engineered specifically for Small-Block Chevy V8 applications. Whether you're restoring a vintage C10 pickup, upgrading your K10 4x4, or building a high-performance Suburban, these headers deliver the perfect combination of power, sound, and reliability.
Our Chevy C10 headers are manufactured from T304 stainless steel with a mirror-polished chrome finish that resists corrosion and looks stunning under the hood. The 1-1/2" primary tubes and 3" collector are optimised for Small Block Chevy engines ranging from 283 to 400 cubic inches, providing excellent exhaust velocity without sacrificing low-end torque.
At AMVirtuo, we believe performance upgrades shouldn't be a luxury. That's why we've designed these small block Chevy headers to offer professional-grade quality at a price point that respects your build budget. Every set is tested for fitment and durability, ensuring your classic truck project starts with a solid foundation.
Vehicle Fitment
| Years | Model | Drive | Engine |
|---|---|---|---|
| 1966-1987 | Chevrolet C10 / C20 / C30 | 2WD | 283-400 cu.in. Small Block V8 |
| 1966-1987 | Chevrolet K10 / K20 / K30 | 4WD | 283-400 cu.in. Small Block V8 |
| 1966-1987 | GMC C1500 / C2500 / C3500 | 2WD | 283-400 cu.in. Small Block V8 |
| 1966-1987 | GMC K1500 / K2500 / K3500 | 4WD | 283-400 cu.in. Small Block V8 |
| 1966-1991 | Chevrolet Blazer / Suburban | 2WD / 4WD | 283-400 cu.in. Small Block V8 |
| 1966-1991 | GMC Jimmy / Suburban | 2WD / 4WD | 283-400 cu.in. Small Block V8 |
| 1988-1991 | Chevrolet / GMC R/V Series (Square Body 3500) | 2WD / 4WD | 283-400 cu.in. Small Block V8 |
⚠️ Important Fitment Notes
Engine Compatibility: Designed for Small Block Chevy (SBC) V8 engines only—283, 305, 307, 327, 350, and 400 cubic inches. Will NOT fit Big Block Chevy (BBC) or LS-series engines.
Spark Plug Requirements: Angled spark plug cylinder heads (common in 1973-1987 models) may require heat shield adjustments. Use short-thread spark plugs (Accel 0576S conical seat or Accel 0414S gasket seat) and plug wire heat shields to prevent clearance issues.
4WD Considerations: Stock-height 4WD trucks may experience interference with the front driveshaft. Lifted trucks typically have no issues.
Source: Product specifications and fitment based on listed product specifications and GM Square Body Truck Forum installation guides.
Technical Specifications
| Specification | Details |
|---|---|
| Header Type | Long Tube |
| Primary Tube Diameter | 1-1/2" (38mm) |
| Collector Diameter | 3" (76mm) |
| Head Flange Thickness | 5/16" (8.0mm) Laser-Cut Steel |
| Pipe Thickness | 16 Gauge (1.5mm) |
| Material | T304 Stainless Steel |
| Surface Finish | Polished Chrome |
| Welding | Multi-Pass TIG Welded |
| Fitment Type | Direct Replacement |
Headers vs Stock Exhaust Manifolds
If you're debating between upgrading to long tube headers or replacing them with factory-style manifolds, here's what you need to know:
| Feature | Stock Manifolds | AMVirtuo Long Tube Headers |
|---|---|---|
| Material | Cast Iron (prone to cracking) | T304 Stainless Steel |
| Design | Restrictive internal passages | Full-length mandrel-bent tubing |
| Exhaust Flow | Creates backpressure | Eliminates backpressure |
| Performance | Limited power gains | Improved throttle response & torque |
| Sound | Muffled, restrictive tone | Deeper, more aggressive exhaust note |
| Durability | Brittle, prone to cracking under thermal stress | Flexible, resists fatigue from heat cycles |
| Weight | Heavy cast iron | Lighter stainless steel construction |
The Bottom Line: Factory cast-iron manifolds on older trucks are known to crack and warp over time. Upgrading to stainless steel long tube headers provides improved exhaust flow, better sound, and long-lasting durability for both daily driving and performance applications.
Installation Notes
Professional installation is strongly recommended for optimal results. Here are important considerations for your SBC headers installation:
- Spark Plug Clearance: Must use short-thread spark plugs (Accel 0576S or 0414S) and plug wire heat shields. Standard spark plugs will cause interference issues. Angled spark plug cylinder heads (1973-1987 models) may require additional heat shield modifications.
- Pre-Fit Before Installation: Test-fit the headers before final installation. This helps identify any clearance issues with steering components, firewall, or frame rails.
- Torque Specifications: Use a torque wrench and tighten bolts to 25-30 ft-lbs per bolt for optimal sealing with the 5/16" flanges.
- Gasket Installation: Apply high-temperature silicone to gaskets on both sides before installation. Allow to slightly dry before final tightening. Consider upgrading to Fel-Pro Performance gaskets for the best results.
- Re-Torquing: After installation, re-torque all bolts after the first heat cycle and continue checking monthly until bolts no longer loosen.
- Spark Plug Wire Routing: Replace factory wires with 90-degree boots to keep wires away from hot header tubes. Use wire looms and heat sleeves for additional protection.
Pro Tip: Many experienced installers recommend using studs with copper lock nuts instead of bolts for the header-to-head connection. This provides more consistent clamping force and makes future header removal much easier. Source: GM Square Body Truck Forum installation discussions.
What's Included
- 1x Driver Side Long Tube Header
- 1x Passenger Side Long Tube Header
- Exhaust Gasket Set
- Mounting Bolts & Hardware Kit
At AMVirtuo, we want every customer to feel confident when purchasing from us. If something isn’t right, our team will always do our best to help resolve the issue quickly and fairly.
Please review the policy below for details on returns, cancellations, and refunds.
30-Day Return Window
We offer a 30-day return window from the date your order is delivered.
If you are not completely satisfied with your purchase, you may request a return within this period, provided the product meets the return conditions listed below.
Order Cancellation
Orders may be canceled within 24 hours of purchase.
If your cancellation request is received within this timeframe, we will issue a full refund. Refunds are typically processed within 24 hours after confirmation.
If the order has already been processed or shipped after the 24-hour window, cancellation may no longer be possible. In this case, the order may be returned after delivery following our return policy.
Return Conditions
· To be eligible for a return, items must meet the following requirements:
· The return request must be made within 30 days of delivery
· The item must be unused and in new condition
· The product must be returned in its original packaging
· All included hardware, accessories, and components must be returned
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Returns Due to Product Quality Issues
If a return is requested due to a product defect or quality issue, please get in touch with our support team and provide:
Your order number
Photos or videos showing the issue
Once our team confirms the issue, AMVirtuo will cover the return shipping cost.
After the returned item is received and inspected, a full refund will be issued. Refunds are typically processed within 48–72 hours after inspection.
Returns for Other Reasons
If a return is requested for reasons such as:
Ordered the wrong product
No longer needed
Changed your mind
Refused delivery
The customer will be responsible for the return shipping cost.
Once the returned item arrives at our warehouse and passes inspection, the refund will be issued. Please allow up to 2 weeks for the return to be processed and the refund to appear.
Installation and Fitment Responsibility
Automotive performance parts, including exhaust headers and engine components, may require professional installation and proper vehicle compatibility verification.
Customers are responsible for ensuring the product is compatible with their vehicle before purchasing.
Products that have been installed, used, or modified may not be eligible for return.
Non-Returnable Items
For safety and quality reasons, the following items may not be eligible for return:
Products that show signs of installation or use
Products that are damaged during installation
Items returned without original packaging or components
Refund Processing
All refunds will be issued to the original payment method used at checkout.
Processing time may vary depending on your payment provider, but refunds are typically completed within a few business days after approval.
How to Start a Return
To request a return, please contact our support team:
Please include:
Your order number
The reason for the return
Photos or videos if applicable
Our support team will guide you through the return process and provide the necessary return instructions.
Our Commitment
At AMVirtuo, we are committed to providing reliable performance parts and excellent customer service.
If you ever have questions or concerns about your order, please reach out to us. Our team will always do our best to help and make things right.