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Flashark Cold Air Intake Kit For 1996-2004 Ford Mustang GT 4.6L V8
The 1996-2004 Mustang GT's 4.6L SOHC V8 was Ford's first modular V8 in the Mustang — but the factory air intake never gave it room to breathe. The stock setup routes air through a restrictive plastic intake silencer, a flat-panel paper filter, and a narrow-diameter duct, all tuned for cabin quietness rather than flow. By the time air reaches the throttle body, significant velocity and density have been lost.
The FLASHARK Cold Air Intake Kit replaces this entire chain with a 3.5-inch mandrel-bent aluminum tube and a high-flow dry cotton gauze filter, shielded from engine heat by a black powder-coated steel enclosure. Dyno testing shows gains of 5-15 HP and 6-8% torque across the 4.6L's powerband — no ECU reflash required. Whether your Mustang has the early non-PI heads (1996-1998, 215 hp) or the later PI heads (1999-2004, 260 hp), the intake delivers a sharper throttle response and a deep, aggressive induction growl that the factory spent years suppressing.
Installation is a true bolt-on: 30-60 minutes with basic hand tools, factory MAF plugs directly in, and all mounting hardware is included. For the money, there is no faster way to wake up a 2V 4.6L Mustang before moving on to exhaust, gears, or a tune.
Key Features
3.5" Mandrel-Bent Aluminum Intake Tube — smooth, unrestricted airflow path replaces the factory's multi-chamber plastic silencer; black powder-coated finish for heat resistance and corrosion protection
High-Flow Dry Cotton Gauze Filter — 95% filtration efficiency, washable and reusable; no oil required, so no risk of coating the MAF sensor
Black Powder-Coated Steel Heat Shield — isolates the filter from engine bay heat soak, directs intake air toward the cooler fender well area
True Bolt-On Installation — reuses factory mounting points, MAF housing, and PCV plumbing; 30-60 minutes with hand tools, no cutting or drilling
OEM MAF & IAT Sensor Compatible — calibrated MAF housing maintains factory air/fuel ratios, no check engine light or idle issues
Aggressive Induction Sound — deep intake growl under wide-open throttle lets the 4.6L finally sound like the V8 it is
Specifications
Brand: FLASHARK
SKU: FLIS25046
Material: 6061 aluminum piping
Tubing Finish: Black powder-coated
Tube Diameter: 3.5" (89mm)
Filter Type: Dry
Filter Media: Cotton gauze
Filtration Efficiency: 95%
Heat Shield: Included
Installation: Bolt-on, 30-60 minutes
Tuning Required: No
Warranty: 1 Year
Package Includes
2x 3.5" mandrel-bent aluminum intake tube
1x High-flow dry cotton gauze air filter
2x Silicone coupler set
5x Stainless steel hose clamps
1x Mounting hardware kit
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| Years | Make | Model | Engine |
|---|---|---|---|
| 1996-2004 | Ford | Mustang GT | 4.6L SOHC V8 (2V) |
| 1999-2004 | Ford | Mustang GT (PI Heads) | 4.6L SOHC V8 |
| 1996-1998 | Ford | Mustang GT (Non-PI Heads) | 4.6L SOHC V8 |
Q1: What vehicles does this 4.6L Mustang GT cold air intake fit?
A: This kit fits all 1996-2004 Ford Mustang GT models equipped with the 4.6L SOHC (2V) V8 engine. This covers both SN95 (1996-1998) and New Edge (1999-2004) body styles. It does NOT fit Cobra, Mach 1, or V6 Mustangs.
Q2: What's the difference between PI and non-PI 4.6L engines for this intake?
A: 1996-1998 Mustang GTs use non-PI (Performance Improved) heads rated at 215 hp. 1999-2004 GTs use PI heads rated at 260 hp. This intake kit fits both — the MAF housing, throttle body diameter, and mounting points are identical across all 2V 4.6L GT engines from 1996-2004.
Q3: How much horsepower does this intake add to a 4.6L Mustang GT?
A: Dyno testing shows gains of 5-15 HP and 6-8% torque, depending on supporting mods. Non-PI cars (1996-1998) tend to see gains on the higher end of that range since the factory intake is more restrictive. Gains are most noticeable in the 3,000-5,000 RPM range, where the 4.6L 2V needs airflow the most.
Q4: Do I need a tune after installing this cold air intake?
A: No tune is required. The MAF housing is calibrated to maintain factory air/fuel ratios, so the ECU adapts automatically. That said, a custom tune can extract additional gains by optimizing timing and fuel curves for the increased airflow.
Q5: Will this intake cause a check engine light?
A: No, when properly installed. The MAF housing diameter matches the OEM specification, so the ECU readings remain within expected parameters. A CEL usually indicates a loose coupler (unmetered air leak), a misaligned MAF sensor, or a damaged sensor O-ring during installation.
Q6: Is the filter oiled or dry?
A: This kit uses a dry cotton gauze filter — no oil required. This eliminates the risk of oil contamination on the MAF sensor, a well-known issue with oiled filters on Ford MAF systems. The filter is washable and reusable.
Q7: Will this make my Mustang GT sound louder?
A: Yes. The factory intake silencer and restrictive airbox were designed specifically to quiet the 4.6L's induction noise. Removing them and replacing them with a free-flowing aluminum tube produces a deep, aggressive intake growl under acceleration — especially above 3,000 RPM. It's one of the most noticeable changes owners report after installation.
Q8: Does this intake improve throttle response?
A: Yes, throttle response improvement is often the most noticeable gain — even more so than peak horsepower. The reduced restriction and shorter, smoother airflow path mean the engine reacts faster to throttle input, particularly during mid-range acceleration and highway passing.
Q9: How long does installation take?
A: 30-60 minutes with basic hand tools (ratchet set, flathead screwdriver, pliers). No cutting, drilling, or permanent modifications are required. The kit uses all factory mounting points and includes step-by-step instructions.
Q10: Does this fit automatic and manual Mustang GTs?
A: Yes, it fits all 1996-2004 Mustang GT 4.6L models regardless of transmission type. The intake routing and mounting points are identical between automatic and manual cars.
Q11: Will this intake improve fuel economy?
A: Some owners report a 1-2 MPG improvement under highway cruising conditions due to reduced pumping losses. However, this is highly dependent on driving style — the more aggressive induction sound tends to encourage a heavier right foot, which negates any efficiency gains.
Q12: What's the difference between a cold air intake and a short ram on the 4.6L?
A: A cold air intake routes the filter away from the engine (toward the fender well) to draw cooler, denser air for more power. A short ram places the filter closer to the throttle body for faster throttle response, but inhales hotter engine-bay air. This kit is a cold-air design with a heat shield to maximize the benefits of cooler intake temperatures.
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Every order comes with a 14-day free return, provided the item is brand new, uninstalled, and in its original packaging. We cover return shipping for quality issues. Refunds are processed within 3-5 business days. Click for Return Policy
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