FAQ: 1964-1973 Mustang Long Tube Headers (289/302W/351W)
Q1: Will these long tube headers fit my 1964-1973 Ford Mustang with a 302 Windsor engine?
A1: Yes! These headers are specifically engineered for the 1964-1973 Ford Mustang chassis equipped with small-block Ford engines, including the 260, 289, and 302 Windsor (302W). They provide optimal exhaust scavenging for classic pony cars, significantly improving mid-range torque and high-end horsepower.
Q2: Are these headers compatible with 351 Windsor (351W) engine swaps?
A2: Yes, they are compatible with 351W engines. However, due to the 351W's taller deck height compared to the 302, engine bay clearances (especially near the shock towers and steering shaft) may be tighter. Some minor adjustments or specific engine mounts may be required for a perfect fit in earlier 1964-1966 models.
Q3: Do these headers clear the factory power steering slave cylinder and gearbox?
A3: For Mustangs equipped with factory power steering, a power steering drop bracket is usually required to provide adequate clearance for the long primary tubes. This is a standard requirement for almost all long-tube header installations on classic Fords to prevent heat damage to the steering components.
Q4: Can I use these headers with a manual transmission and the original Z-bar clutch linkage?
A4: Yes, these Flashark headers are designed to be compatible with most factory manual transmission Z-bar linkages. However, due to the nature of 1 5/8" primary tubes, we recommend checking the clearance once installed. They also fit popular automatic transmissions like the C4 and C6.
Q5: What are the performance benefits of 1 5/8" primary tubes over the stock manifold?
A5: The 1 5/8" primary tubes offer a significant upgrade over restrictive stock cast-iron manifolds. By reducing backpressure and improving exhaust flow velocity, you can expect a gain of 15-25 horsepower and a much more aggressive, deep V8 exhaust note. This is the best "bang-for-your-buck" bolt-on for classic Ford V8s.
Q6: Are the gaskets and mounting bolts included in the kit?
A6: Yes! The Flashark EH28102 kit comes complete with high-quality gaskets, header bolts, and 3-bolt flanges for the collectors. Everything you need for a standard bolt-on installation is included in the package.
Q7: Will I have ground clearance issues on a lowered Mustang?
A7: These headers are designed to tuck as closely as possible to the floorboards. While long tubes naturally sit lower than shorty headers, our design minimizes scraping risk on moderately lowered vehicles. Always ensure your suspension is properly dialed in to maintain safe clearance.
Q8: How does the 16-gauge stainless steel benefit the longevity of the headers?
A8: Unlike cheap mild steel headers that rust through within a few years, our 16-gauge T304 stainless steel construction offers superior corrosion resistance and heat management. The 3/8" thick flanges prevent warping, ensuring a leak-free seal for years of spirited driving.
Q9: Are these headers compatible with GT40 or GT40P cylinder heads?
A9: They fit standard Ford small-block heads and GT40 heads perfectly. However, if you are using GT40P heads (commonly found on Explorer 5.0 engines), spark plug clearance can be an issue due to the revised plug angle. In such cases, we recommend using 90-degree spark plug boots or shorty spark plugs.
Q10: Does the "Mirror Polish" surface finish stay shiny after use?
A10: The mirror polish looks incredible for shows and initial installation. Like all high-quality stainless steel exhaust parts, the headers will naturally change color (turning a gold/blue hue) after being heat-cycled. This "bronzing" is a hallmark of genuine stainless steel and does not affect performance.
Q11: Will I need to relocate my oil filter or starter motor?
A11: In most 289/302W applications, no relocation is necessary. These headers are designed to clear the standard starter and oil filter locations. However, using a "Mini-Starter" is a popular upgrade among Mustang enthusiasts to provide extra heat clearance and easier access.
Q12: Is any welding required during the installation?
A12: No welding is required for the headers themselves as they are a bolt-on design. However, since these are long tube headers, you will likely need to modify your existing exhaust pipes (or install a matching H-pipe/X-pipe) to connect to the 3-inch collectors.
