jmeiers
New Member
- Joined
- June 20, 2000
- Messages
- 5
- Reaction score
- 1
- City, State
- Ashburn, VA
- Year, Model & Trim Level
- 2015 Explorer Sport
Hello everyone.
I have a 1999 Explorer Sport 4x4 (4.0 SOHC) with every option. I would like to know what the basic mods are for my Explorer. I am mainly a Mustang person but would like to put some basic mods on my Explorer even though it doesn't stand a chance against my 97 Cobra. hehe
I have read a couple of posts and I have some questions on typical simple mods.
Should I get the KKM intake or do the standard K&N drop-in?
Should I get an entire catback or just weld in a muffler?
- If just a muffler, then what are the diameters of the stock exhaust pipes?
Has anyone tried Dynomax Race Magnums or Borlas? I am not into chambered mufflers like Flowmasters because of the drone associated with them, so I would like to get a straight-thru design muffler.
Does anyone make an aftermarket h or x pipe with hi-flow catalytic convertors? I know this mod is more mustang related but I am not sure what they call this section of the exhaust on the Explorer.
Does anyone make any headers for the 4.0 SOHC?
How about nitrous or superchargers?
Any other routine mods?
At least I don't have to do gears on this one due to the fact that it has 4.10's already.
Any advice would be greatly appreciated. I am sure I will be asking more questions.
Thanks, Jason
I have a 1999 Explorer Sport 4x4 (4.0 SOHC) with every option. I would like to know what the basic mods are for my Explorer. I am mainly a Mustang person but would like to put some basic mods on my Explorer even though it doesn't stand a chance against my 97 Cobra. hehe

I have read a couple of posts and I have some questions on typical simple mods.
Should I get the KKM intake or do the standard K&N drop-in?
Should I get an entire catback or just weld in a muffler?
- If just a muffler, then what are the diameters of the stock exhaust pipes?
Has anyone tried Dynomax Race Magnums or Borlas? I am not into chambered mufflers like Flowmasters because of the drone associated with them, so I would like to get a straight-thru design muffler.
Does anyone make an aftermarket h or x pipe with hi-flow catalytic convertors? I know this mod is more mustang related but I am not sure what they call this section of the exhaust on the Explorer.
Does anyone make any headers for the 4.0 SOHC?
How about nitrous or superchargers?
Any other routine mods?
At least I don't have to do gears on this one due to the fact that it has 4.10's already.

Any advice would be greatly appreciated. I am sure I will be asking more questions.
Thanks, Jason