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Guys, I have this annoying rattling noise around 2000rpms ever since I put on my offroad h-pipe on my 03 cobra. I have flows out back. Now the noise only starts when I let off the gas and around certain rpms, 2000-2500rpms. It is kind of a rattling noise that is either coming from my h-pipe...

Do you think I will gain any HP if I switch from my flowmaster catback to Borla Stingers. My flows have this annoying rattling sound coming from the when it drones, around 2000rpms, plus I heard Borla Stingers will givel you 25rwhp over stock and truthfully I did not feel any hp gains after the...

On the way to work this morning, I was in real heavy traffic, stop and go for about 40minutes in first and second gear. All of a sudden I see small puffs of smoke and a hot smell coming from the vents on my hood. Have any of you guys had this issue in their 03/04 cobra's. Mine only has 4500...

Last night I got my first speeding ticket in my 03 cobra. I was going 68mph in a 45mph zone. Lucky I was only in second gear. Have any of you guys had tickets lately and did your insurance go up? This is only my second ticket in 5 years. I am going to court to dispute it. Peace!

Guys, I have the following bolt ons, drop in K&N airfilter, offroad h-pipe, flowmaster catback. I had my car dynoed a coupld of weeks ago, and at WOT my airfuel ratio was pretty rich up top (above 4,500 rpms). My questions is, under normal driving conditions, how would you expect my air fuel...

Guys, Will adding a offroad h-pipe and catback generally make you run lean or rich over the stock set-up. It is freeing up airflow, so I am not 100% sure which way it will affect your air fuel ratio. Any comments are greatly appreciated. Peace!

Guys, Are any of you experiencing a ticking noise coming from the engine bay on your 03/04 cobra's. Do you know what could be causing this, and if there is a solution. Is it anything to be concerned about?

Guys, I would like your input on this one. I have AT flowmasters on my 03 Cobra, and I am going to do K&N FIPK and a tune, not sure which one yet. That should put me close to 400rwhp, right. I am not going to do any more performance mods for now, since it is my daily driver, but I would like to...

I am trying to decide on whether to get an offroad H-pipe or x-pipe for my new 2003 cobra. I have the American Thunder catback system already. Any idea on what the hp and torque increase is on the H-pipe and x-pipe? Any input is greatly appreciated.

I am planning on getting an offroad x-pipe and the K&N FIPK. Will I need a tune when I add these two parts? I have read the the CAI will make you run lean, and the offroad x will make you run rich. So should I be ok with the factory tune with regards to these two bolt ons? It is my daily driver...

I have a Prochamber off my 2002 GT. Will it fit my 2003 Cobra? Do any of you guys know what type of rwhp numbers you get from the American Thunder Catback system on the 2003 Cobra's.