external eng. parts and performance

derekrichardson · Feb 16, 2006

I have a 93 XJ with 130k on the 4.0 and only a Dynomax cat back exhaust.

I want to do plugs, wires, cap/rotor, ghetto/fab K&N.

Is there any specific recommendations for the above parts? Also, I may need new exhaust soon and I want to go with a Flowmaster 50 series. Is there a cheaper twin to that muffler? And anyone using a higher-flow cat with good results?

I've used the search but I wanted to print out a list so I can bring it to the parts store and I didn't have good luck finding good answers yet.

Thanks! derek

jeeperjohn · Feb 16, 2006

I have heard good things about splitfire plugs and wires. I prefer accell caps and rotors, but any set with all brass contacts should be good. A hand fabbed intake tube is a good idea if you need to save some bucks. Try the Mac flowpath muffler, I had them on a mustang and liked them. I would think that a higher flow cat would not be much of an improvement without freer flowing parts in the rest of the exhaust.

CharlesS · Feb 16, 2006

My personal experience with SplitFire plugs on my 98 XJ was TERRIBLE.... Performance dropped off, gas mileage dropped and engine missed....
Installed Champion Truck Plugs and they have been GREAT !!!! Been using them ever since....

Charles

Midnight Krawler · Feb 16, 2006

The Flowmaster exhaust is alot louder than the Dynomax and it will drone at certain RPM's. This can get real annoying, but Might be cool if your 16 years old though. I used to setoff car alarms driving down residential streets with it.

Dr. Dyno · Feb 16, 2006

derekrichardson said:
I have a 93 XJ with 130k on the 4.0 and only a Dynomax cat back exhaust.

I want to do plugs, wires, cap/rotor, ghetto/fab K&N.

Is there any specific recommendations for the above parts? Also, I may need new exhaust soon and I want to go with a Flowmaster 50 series. Is there a cheaper twin to that muffler? And anyone using a higher-flow cat with good results?

I've used the search but I wanted to print out a list so I can bring it to the parts store and I didn't have good luck finding good answers yet.

Thanks! derek

Looks like you need to browse my sites for some ideas.
__________________________________
1992 XJ Laredo 4-dr - 198k miles - 23k miles on 4.6L HO Stroker
AX15, NP231, D35c, D30

270hp@4950/327lbft@3750, 1/4 mile = [email protected], 0-60 = 5.6secs

Websites - Jeep 4.0 Performance, 4.6L Stroker Build-Up, Dino's Jeep Tricks

external eng. parts and performance

derekrichardson

NAXJA Forum User

jeeperjohn

NAXJA Forum User

CharlesS

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Midnight Krawler

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Dr. Dyno

NAXJA Forum User

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