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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SKU: AM-33026
Chevy Blazer Long Tube Headers T304 Stainless Steel Surface Close-Up Showing Weld Quality and Corrosion Resistance for Small Block V8
$239.99 USD

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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

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