Will the Check Engine light come on after installation?

Generally no. This product retains the factory oxygen sensor mounting positions and maintains a reasonable exhaust back pressure range. However, if your vehicle's ECU is very sensitive to air-fuel ratio, it is recommended to perform an ECU reset or professional tuning after installation.

Will this header be louder than the factory exhaust manifold?

The sound becomes clearer and more performance-oriented, with an increase of about 3‑6 dB at idle and low RPM, and a more solid exhaust note at high RPM. But it does not produce harsh noise or "rasp," and there is no increase in resonance (under normal installation conditions).

Can these exhaust manifolds increase horsepower?

They are designed to improve exhaust flow and reduce restriction, which can help increase horsepower, torque, and throttle response. Actual results may vary depending on vehicle configuration and other modifications.

Is this a short header or a long header? What is the difference between the two?

This is a shorty header. Short header: improves mid-to-low end torque, directly replaces the factory part, easy installation, moderate sound. Long header: improves high-RPM horsepower, requires exhaust modification, complex installation, loud sound and may affect ground clearance.

1-5/8" Exhaust Header For 2000-2016 Silverado Sierra 1500 2500/3500HD 4.8 5.3 6.0 V8 | Suncent®

Name: 1-5/8" Exhaust Header For 2000-2016 Silverado Sierra 1500 2500/3500HD 4.8 5.3 6.0 V8 | Suncent®
Brand: SuncentAuto
SKU: 8685EXP05N8US
Price: 169.99 USD
Availability: InStock
Rating: 4.67 (18 reviews)

(18)

SKU: 8685EXP05N8US

Check if this fits your vehicle

Color *

Quantity

Brand

Suncent®

Condition

100% New

Material

T-304 Stainless Steel

Head Flange Thickness

3/8"

Primary Tube Size

1-5/8"

Inlet

1-3/4"

Outlet

2-1/2"

Engine Size

Vortec 4800 5300 6000 V8 Engine

Surface

Chrome Polish

Certificate

ISO9001:2015

Primary Tube Gauge

16 gauge (1.5mm)

Length

22.44"

Width

14.17"

Height

5.51"

Item Weight

15.54 lbs

The 1-5/8″ primary pipe helps improve exhaust flow and reduce back pressure.
4-into-1 equal-length design: equal-length runner design balances exhaust pulses, reduces back pressure and turbulence, and boosts horsepower and torque output.
T-304 full stainless steel: high-quality T-304 stainless steel, high temperature resistant, corrosion resistant, durable.
Bolt-on installation: no welding or modification required, directly replaces the factory exhaust manifold, easy to install.
Effectively improves fuel economy: optimizes exhaust flow, reduces pumping losses, can improve fuel efficiency by 3%-5%.
Chrome steel polished finish: upgrades the look under the hood, plus an additional anti-corrosion layer.
Better sound experience: exhaust note becomes clearer and more aggressive while suppressing unwanted dull tones.

Fitment Information

2002-2009 Chevrolet Silverado 1500
2000-2004 Chevrolet Silverado 2500
2002-2016 Chevrolet Silverado 2500 HD
2001-2006 Chevrolet Silverado 3500
2007-2016 Chevrolet Silverado 3500 HD
2000-2004 GMC Sierra 2500
2001-2006 GMC Sierra 3500

Only Fit Vortec 4800 5300 6000 V8 Engine.

SuncentAuto Exhaust Header vs Stock Exhaust Manifold

Comparison	Suncent® High Performance Exhaust Header	Stock Cast Iron Exhaust Manifold
Material & Structure	T-304 stainless steel, 1-5/8″ primary tube, 2-1/2″ outlet, laser-cut 3/8″ thick steel flange	Cast iron, restricted original size passages, thin cast flange
Performance	Significantly reduced back pressure, smoother exhaust flow, expected 15–25+ HP increase, torque increase across entire RPM range	Higher back pressure, restricts engine breathing efficiency, no additional gain, conservative factory calibration
Sound & Heat	Clearer, more aggressive exhaust note; quickly expels high-temperature exhaust gas, lowers engine bay temperature	Plain factory exhaust sound, noticeable heat buildup
Weight & Fuel Economy	Lightweight stainless steel design, reduces weight by 10-30 lbs; can improve fuel efficiency by 3–5%	Cast iron is heavier, factory level fuel economy
Installation & Appearance	Bolt-on, no welding required; chrome polished finish, improves engine bay look	More complex disassembly/assembly, factory cast iron appearance

Performance data based on typical modification environments. Actual gains vary by vehicle model, engine condition, and accompanying modifications.

Package Content & Installation Notes

What's Included in the box:

✅ Vortec exhaust manifold x2
✅ Exhaust manifold gasket x2
✅ Outlet flange gasket x1
✅ Bolt kit (screws x18 and nuts x6)

Installation Tips:

Professional advice - It is strongly recommended that installation be performed by an experienced modification technician or professional mechanic. The exhaust system involves high temperatures, sealing, and emissions regulations; installation quality directly affects performance and safety.
Gasket replacement - Every time you replace the exhaust manifold, be sure to install a new exhaust manifold gasket to ensure sealing integrity.
Break-in period notes - During the first drives after installation, listen for any abnormal noises, exhaust leaks, or check engine light warnings.

Why Buy Exhaust Header from SuncentAuto?

🇺🇸 US local warehouse, fast shipping — Suncent has local warehouses in the US, providing fast delivery service throughout the continental US, say goodbye to long overseas transit times.
🚚 Free shipping on all orders — All orders within the continental US enjoy free shipping.
🔄 45-day worry-free returns — Return requests can be made within 45 days of receipt, provided the product remains unused and includes all original packaging and accessories. After-sales protection gives you peace of mind.
🏆 ISO9001:2015 certified — Product quality system is guaranteed; every set of exhaust headers undergoes strict quality control and inspection procedures.
🛒 One-stop shopping experience — From exhaust headers to cold air intakes, from aftermarket upgrade parts to OEM replacements, the Suncent platform covers a wide range of categories, so you don't have to search multiple places to get all the parts you need for your vehicle upgrade.

Ready to Unlock Your Silverado's True Potential?

Increase horsepower · Optimize response · Experience a new driving passion

Whether it's daily commuting, heavy towing, or track driving, the Suncent® high-performance exhaust header helps your Vortec V8 engine unleash more powerful performance.

🛒 Buy now, order today and enjoy an exhilarating driving experience sooner!

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Reviews

4.67/5

Average Of 18 Reviews

5 Star			72%
4 Star			22%
3 Star			6%
2 Star			0%
1 Star			0%

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