Next mods for a 99 Cobra?

[Landmonster]

I recently purchased a clean 1999 Cobra, with some bolt-on modifications installed by the previous owner.

The car dynoed at 311 RWHP.

Here are the mods:

Exhaust:
BBK Chrome long-tube headers
BBK X-pipe with high-flow cats
Magnaflow 2.5" stainless catback system

Intake:
Cold air intake with K&N air filter

Drivetrain:
3.73 Ford rear-end gears
Centerforce Dual-Friction clutch kit
Short-throw shift kit

Other Performance Mods:
SCT Xcalibrator 3 programmer
Underdrive pulleys



What are the next logical upgrades? Are any of the exhaust mods worth replacing, with something better?

 

[blackfang]

You should swap out the 3.73's for some 4.30's if you plan on staying NA

 

[horsinaround9]

You should swap out the 3.73's for some 4.30's if you plan on staying NA

I will second that. I had 4.30s in my 01 when it still had the i.r.s before the blower. I loved them.

 

[blackfang]

I had 4.10's in my 99 and 4.30's in my 97 and the 4.30's definitely were the way to go. I wish I went 4.56's.

 

[Landmonster]

What are 4.10s and/or 4.30s going to do to my gas mileage? this car is a daily driver, and seems to get like 17-18mpg as it is.


Furthermore, what about some suspension mods?

 

[shoobs99svt]

What are 4.10s and/or 4.30s going to do to my gas mileage? this car is a daily driver, and seems to get like 17-18mpg as it is.

Bone stock I was at 18 city and 25 hwy. Now with the 4.30s and other mods, im at 16.5 mpg, but thats ALL CITY. No idea what it is on the hwy.

 

[SVT32VDOHC]

From a 3.27 to a 4.10, I didn't notice gas mileage. I really don't care either since I don't DD any more my Mustangs. Even after the Vortec on my 96, I didn't notice a gas mileage change.

Your power is great right now. Next up, a hit of nitrous, or take the u/d pullies off and get a supercharger.

 

[shoobs99svt]

What are 4.10s and/or 4.30s going to do to my gas mileage? this car is a daily driver, and seems to get like 17-18mpg as it is.

BUMP only because I finally used one full tank on the highway...

My 4.30s let me keep 16.5 city and 20.2 highway mpg's

 

[tsacch]

I have the same dilemma I have a 1999 cobra vert with high flow cats and full bassani exhaust, JLT intake and SCT tune......so I want the next step but want to keep daily drivability. Let me know what you do. Changing to 3.73's or 4.10's is a logical step for me, but very expensive to have some one do it.