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1998 Mustang Information & Specifications

1998 Mustang Overview:

Most of Ford's time and money was being spent on the upcoming ''New Edge'' refresh for the fourth generation Mustangs, and only a few minor tweaks occurred between the 1997 and 1998 Mustang models. The most notable change was an increase in the power rating of the 4.6L SOHC V8 of the GT because of slight tweaks to the fuel system along with a PCM calibration that brought the horsepower up to 225hp with 290ft/lbs of torque. The base model kept its 150 horsepower 3.8L Essex V6 while the Cobra's 4.6L DOHC V8 remained unchanged with 305 horsepower. 1998 was the last year for the standard Fox-4 platform before switching over to the New Edge design, but they still get some love from us here at Stage 3 Motorsports. We have a huge selection of performance parts that can make the fourth generation cars shine on for ages.

1998 Mustang Aftermarket Performance Parts

Both the horsepower and torque of the 4.6L V8 can be substantially increased with a few bolt-on modifications that keep the fourth generation '98 Mustang competitive on the street or track. The easiest way to squeeze an extra 10 to 15 horsepower out of the SN95s is by installing a functional cold air intake in place of the factory air box. Most of Stage 3's cold air intakes for 1998 Mustangs have inlet tubing that runs from the throttle body to the fender wall where their included high-capacity air filter is better protected from engine heat. CAIs are able to deliver a large quantity of cool charge air to the combustion chamber that instantly increases power and torque. Upgrading to an aftermarket throttle body is a common practice, especially while the Mustang's intake system is partially disassembled for the CAI install. Most uprated throttle bodies have larger diameters than stock and allow for more efficient airflow into the intake manifold and adding about 10 horsepower on to total output. The final engine compartment accessory that we recommend to most of our naturally aspirated and turbocharged customers is a set of underdrive pulleys. Underdrive pulleys replace the heavy factory cast iron pulleys with smaller, lighter designs that slow down the speeds of belt-driven accessories. The slower rotation creates less drag on the belt allowing the engine to generate more power at the flywheel for a gain of up to 10 horsepower.

BBK Polished 78mm Throttle-Plenum

1998 Mustang aftermarket exhaust upgrades:

The 1998 Mustang's factory exhaust configuration does little for either sound or power, but a few of Stage 3 Motorsports' modifications can make the SN95 sound like and old-school muscle car while giving it all the power necessary for practically any application. Regaining that classic V8 rumble requires a new cat-back exhaust that replaces the factory mid-mufflers, kickover pipes and tips. Cat-back designs can vary significantly between manufacturers, but they generally use specially designed mufflers or muffler deletes to give the Mustang throaty exhaust tones. The kickover pipes are usually mandrel-bent and reduce some of the back pressure caused by the crimped stock pipes. Horsepower can be increased by using an aftermarket x-pipe or h-pipe instead of the factory mid-pipe with its extremely restrictive catalytic converters and overall construction. Performance x-pipes and h-pipes either have high-flow catalytic converters or full catalyst deletes that greatly reduce back pressure and produce 10 to 20 horsepower depending on their specific design. Greater horsepower gains can be found through the use of performance headers. Short tube, ''shorty,'' headers replace the stock exhaust manifold with mandrel-bent tubing that can connect with the stock mid-pipe or aftermarket mid-pipes that are factory-length. Shorty headers can give the engine up to 5 or 10 horsepower depending on the brand and efficiency of their design. For gains of up to 30 horsepower, long-tube headers are the way to go. Long tube headers have extensive tubing that flows between the engine's exhaust ports and a shorty mid-pipe from the same brand. Long tube headers have little to no back pressure and are optimized for efficient exhaust scavenging. Not all of our headers or aftermarket mid-pipes meet emissions requirements for street use in some areas. Check your local emissions guidelines before ordering.

1998 Mustang exterior upgrades:

Now that the engine and exhaust systems have been taken care of, your 1998 Mustang needs an exterior to match it's uprated performance. The best looking additions to the Fox-4 Mustangs is a new set of wheels. Stage 3 has a number of different wheel designs from OE Wheels and Wheel Replicas that can give your SN95 a new, aggressive appearance with several finish types and colors. Along with wheels, some Nitto NT555 ultra-high performance summer tires will allow you to storm through the toughest corners without causing the noise, vibration and harshness typically found in most other performance tire brands. Contact Stage 3 Motorsports for the latest tire prices and sizing. Our inventory of Mustang headlights and taillights are some of our most popular items. Our headlights have near-OE designs with typical halogen bulbs and reflector housings to the newest projector lenses with integrated LEDs and CCFL halos that can be used with HID kits for a modern look.

Cervini's Stalker Rear Fascia

1998 Mustang Specs:

If you're looking for info and specs on the 1998 Mustang GT, you have come to the right place. We list Horsepower numbers, specs, colors, engine options, and much more. also offers 1998 Mustang GT Performance parts and accessories. We have all the 4.6L Mustang Parts you need to make your SN95 mustang look and sound great.

1998 Mustang Engine Horsepower & Torque:

  • 3.8L V6 = 150 hp @ 4000 RPM & 215 lb-ft @ 2500 RPM
  • 4.6L SOHC V8 = 225 hp @ 4200 RPM & 285 lb-ft @ 3400 RPM
  • 4.6L DOHC V8 = 305 hp @ 5500 RPM & 300 lb-ft @ 4000 RPM

1998 Mustang Exterior Colors:

  • Black
  • Bright Atlantic Blue
  • Atlantic Blue
  • Crystal White
  • Dark Green Satin
  • Pacific Satin
  • Laser Red
  • Rio Red
  • Chrome Yellow
  • Silver
  • Autumn Orange
  • Performance Red

1998 Mustang Retail Prices:

  • Standard Coupe $16,150
  • Standard Convertible $20,650
  • GT Coupe $20,150
  • GT Convertible $24,150
  • Cobra Coupe $25,710
  • Cobra Convertible $28,510

1998 Mustang VIN Decoder:

  • 4 3.8L OHV V6 145hp
  • X 4.6L SOHC V8 225hp
  • V 4.6L DOHC V-8 300hp
  • 41 2dr Hatchback LX
  • 40 2dr
  • 42 2dr GT
  • 44 2dr Convertible
  • 45 GT Convertible
  • 6 Check Digit (varies)
  • W Year (W - 1998)
  • F Plant (F - Dearborn)
  • 000001 Consecutive Unit Number
  • 1FA Ford Motor Co.
  • L Restraint System (L-air bags & active belts)
  • P Passenger Car
Mustang Performance Parts
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