I think the headers will make a decent difference because you have higher flowing heads and intakes than regular 5.0s.
If you have removed the intake silencer and installed a K&N panel in the stock airbox, I don't think you are going to see too much of an increase from a cold air kit, they sure look good though 
__________________
1989 LX Convertible, blue with white top and leather, 5 speed.
Engine: GT40 al. heads, Cobra intake, TFS cam, 1.7RR, etc.... LOL Drivetrain: SPEC II clutch & FMS Billet flywheel, Pro 5.0 shifter w/Cobra knob and aluminum driveshaft through 3.73:1 gears. Chassis: 4 wheel disk w/Cobra front brakes, GT rears and 2001 "Bullitt" wheels
Rear: MM adjustable LCAs with Griggs springs, KYB shocks. Front: Koni red struts, FMS "C" springs and full poly bushings. Full length MM sub frame connectors, steeda 2pt. K-brace. Misc.: 130a alt. upgrade, R134a conversion.
Photos of my car
|