JEGS 555-300172 GM LS Swap Header Features:

• Mandrel bent tubing
• Heavy-Duty 3/8 in. thick flanges to prevent warpage
• O2 sensor bungs welded on both collectors

JEGS 555-300172 GM LS Swap Headers Include:

• (12) M8-1.25 x 25.4 mm (1 in.) UHL with 13 mm Hex Flange Head
• (2) LS Header Flange Gaskets

JEGS 555-300172 Recommended Engine Mounts:

• JEGS LS Engine Swap Motor-Mount Adapters, Adapts Small Block Chevy Motor-Mounts to LS-Series Engine 555-50538
• JEGS Solid Engine Mounts, Small Block Chevy 555-50511

Special Exhaust Headers Notes:

• Does not fit applications with manual transmision with column shift
• Due to variations in engine and vehicle configurations, installation of aftermarket headers may require minor modifications
• Common adjustments include power-steering or A/C bracket relocation, dipstick tube modification, or clearance for steering shaft and clutch linkage
• Inspect for worn or collapsed motor mounts, and verify clearance for spark plugs, wires, brake lines, and transmission or fuel lines
• Always test-fit headers before painting or coating to ensure proper alignment and clearance
• Re-torque after initial heat cycles

JEGS 555-300172 Vehicle Fitment:

• 1964-1972 Buick Skylark
• 1964-1977 Chevy Chevelle
• 1964-1988 Chevy El Camino
• 1970-1988 Chevy Monte Carlo
• 1964-1977 Oldsmobile Cutlass
• 1964-1988 Pontiac Lemans
• 1964-1972 Pontiac GTO
• 1977-1988 Pontiac Grand Prix
• 1970-1981 Chevy Camaro
• 1970-1981 Pontiac Firebird
• 1978-1988 Buick Grand National
• 1975-1979 Chevy Nova

FAQ

Are LS headers interchangeable?

Yes, JEGS headers like the 300172 are interchangeable for LS engines, providing compatibility across various LS-powered vehicles, including G-body LS swap applications.

What's the best LS engine to swap?

The best LS engine for a swap depends on your performance goals and application. Common choices include the LS1, LS3, and LS7, each offering unique features for different needs.

Is it worth upgrading headers?

Absolutely. Upgrading to JEGS headers, such as the 300172, enhances exhaust flow, improving engine efficiency, power, and sound. It's a worthwhile investment for any LS engine enthusiast.

How much HP does long tube headers add to LS1?

Long tube headers, like the JEGS 300172, can add significant horsepower to an LS1 engine, with gains often ranging from 10 to 25 horsepower. Actual results may vary based on other modifications and tuning.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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