| The Advantages of The British Northwest Header over the Stock Manifold. |
| Stock Manifold | British Northwest |
| Very Prone to cracking. | Heavy gauge header. None known to crack EVER. |
| Restrictive to air flow. | Approximately 61% greater breath ability |
| Steel studs prone to rust-out, breakage. must be drilled out, helicoiled & welded. Difficult and costly to repair. | Stainless blots used. Simply replace if ever broken. |
| Painted surface only available. Prone to early rust. | Available with 1500-degree mid-range and high-heat paint, lifetime ceramic- metallic coating in black or silver, or chrome plated. |
| Good low end torque properties, but limited on highway. | Inherently better high-end performance. Good low-end performance. Quick-fit kit available for even better low end torque if used off-road. |
| Stock pipes hot in summer. | Cooler heat-shielded tropical system available, as well as heat-isolative coatings. |
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Comparison with the "Other" Header. |
| Header pipes project 3 1/2 inches below the bottom of chassis, exposing them to off road damage from ground, tree stumps, rocks etc. Crushed header limits power to 5% or less. | Header orifice is 6 inches higher than the "other" header, and is thus fully protected by vehicle chassis. |
| Header fold spring shackles, which must be cut for installation. | Shorter design easily clears spring shackles. |
| Starter and generator must be removed to install or remove header. | Superior design allows installation & removal without removing either starter or generator. |
| Exposed collector gathers grass, etc. subjecting vehicle to fire. | Collector is raised up, keeping it clear and removing fire risk. |
| Larger-diameter pipes must be custom fabricated locally. | Pipe system available off the shelf from British Northwest Land-Rover. |
| Many fitted to existing small-diameter exhaust pipes. | British N.W. Free-flow pipe system is bolt on, fully flanged, sleeved and gasketed. |
| Steel pipes subject to rust-out. | Rust resistant aluminized pipes used throughout. |
| Thin steel fabrication. | Heavy-gauge construction throughout. |
| Floating output flange known to distort & leak. | Fixed flange construction is virtually leak-proof. |
| Thin gasket prone to leak. Needs frequent repair. May need multiple gaskets to seal. Frequently leaks even when newly installed. | Triple-thick premium gasket supplied is entirely trouble free. |
| Sold painted only. Paint burns, flakes off, etc. | Specialized coatings supplied, including heat containing materials. |
| Painted headers run hot. | Special coatings available to contain heat in hot climates. |
| Archaic four-pipe design | Superior tri-Y design proven best by research. |
| Must be taken to local muffler shop to fabricate custom pipes or adapter to small restrictive stock pipes. | Free-flow pipe system available off-the-shelf from British North West. |