Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Engine Performance/Intake/Exhaust

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-13-2013, 06:37 PM
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Dec 2012
Location: Albany, N.Y.
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1416
RJ'sWJ is on a distinguished road
Cold air intake and cat back exhaust additions

Has anyone had any experience adding one or both of these to your WJ to try to gain some HP and MPGs?
__________________

Reply With Quote
  #2  
Old 01-13-2013, 08:28 PM
TJXJWJ's Avatar
Wrangler Unlimited Carbonara
My Jeep: 2013 3.7L JK
 
Join Date: Jun 2010
Location: Aurora, OH
Posts: 3,958
Thanks: 232
Thanked 145 Times in 129 Posts
Rep Power: 288355
TJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond reputeTJXJWJ has a reputation beyond repute
Garage
Re: Cold air intake and cat back exhaust additions

I've noticed no increase in MPG, but have noticed a bit more "go". I've got a K&N FIPK, a bored throttle body, and a Magnaflow muffler...the rest of the exhaust is stock.
__________________

__________________
Tony-13 JKU Sahara, Black. LED white fender lights & signals, JW Speaker LED heads and fogs and tails, LED windshield and rear bumper lights, retrofit Homelink GD opener, LED interior lighting, shorty antenna, weathertech liners, Drake gas filler. 67 Designs phone mount, Rugged Ridge hood catches, dead pedal, ventshades, rampage windshield tie down & stops, solid stainless lugs, 20% front tint, sill guards, FMF spare delete kit, OffRoadHeros cargo top, K&N FIPK intake, Smittybilt Molle roll bar covers, and lots of carbon fiber hydrographics. ToDo list: programmer, exhaust, and a bunch of other stuff.
15 Cherokee KL Latitude Edition with cold weather package. Bone stock.
PAST JEEPS : 99 TJ Sport, 98 XJ Sport, 04 WJ Limited, 06 WK Laredo, 09 KK Liberty
Reply With Quote
  #3  
Old 01-14-2013, 11:40 AM
Member
 
Join Date: Jul 2012
Posts: 81
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 1609
JRK5892 is on a distinguished road
Re: Cold air intake and cat back exhaust additions

I have a CAI, K&N cone, ported and polished TB, and Thrush high flow muffler (stock system other than that) the difference at the peddal is NIGHT and day... MPG, not really a change when i first did it i was getting about 1 - 2 MPG better but then it leveled off... i noticed better gas milage more witht the fuel filter replacement hahaha but as far as seat of the pants power, i am very pleased with these changes
__________________
Joe
Chicago, Il
Lots of powder coating and a ton of mods done on my jeep
Reply With Quote
  #4  
Old 01-20-2013, 02:51 PM
Gus9890's Avatar
Premium Member
My Jeep: 2001 4.0L WJ
 
Join Date: Apr 2011
Location: Northeast FL
Posts: 4,713
Thanks: 38
Thanked 71 Times in 70 Posts
Rep Power: 409110
Gus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond reputeGus9890 has a reputation beyond repute
Re: Cold air intake and cat back exhaust additions

I agree, makes a difference but only adds a couple more mpg.
__________________
2001 Silverstone Metallic WJ Limited
2005 Black Chevy Tahoe Z71 4x4
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2006 4.7L Cold Air Intake or Cat Back lewi3069 Grand Cherokee - WK 18 05-22-2010 05:19 AM
Mopar Cat back Exhaust 1 GRAND Grand Cherokee - WK 9 01-29-2010 01:53 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:14 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.