Aftermarket Injectors? - Aftermarket Header?
12-29-2009, 08:08 PM
#1
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Year: 1997
Model: Cherokee
Engine: I6
Aftermarket Injectors? - Aftermarket Header?
Got a 97 XJ with 159,000 miles. I was thinking about buying some Better Fuel Injectors and a Better header. Any suggestions on Injectors and headers? I have a K&N CAI, High Flow Cat, Flowmaster super 40 muffler. I would like it to be a little louder-hoping a better header will fix this. Are aftermarket injectors worth buying? Any Links would be greatly appreciated. Thanks!
12-29-2009, 10:18 PM
#2
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Year: 1997
Model: Cherokee
Engine: Used engine just put in less than 79kmiles onit jeepersCreepers 60mm TB, '99-'01 intake, BorlaHeader
You actually have the best injectors that were put into a cherokee.
'87-90 18.6lb/hr @ 39psi
91-93 21.0lb/hr @ 39psi
94-95 21.0lb/hr @ 39psi
96-98 23.2lb/hr @ 49psi
99-01 22.5lb/hr @ 49psi
The stuff I have read says that the 96-98 injectors and map sencer/computer can handle the upgrades that you might do. and are just as good as the ford injectors that are talked about for a swap. My suggestion is to have them professional cleaned. Mine cost about 130.00 to have done. I have a borla header. The only problem I have with it is when the left front tire drops into a hole/ditch etc. and all the other wheels are on same level of road the front driveshaft hits it. Grant it it has to be a big hole, but I think other headers might have a better design. That would come down closer to the oilpan. Then again my junk could be messed up. My2c.
'87-90 18.6lb/hr @ 39psi
91-93 21.0lb/hr @ 39psi
94-95 21.0lb/hr @ 39psi
96-98 23.2lb/hr @ 49psi
99-01 22.5lb/hr @ 49psi
The stuff I have read says that the 96-98 injectors and map sencer/computer can handle the upgrades that you might do. and are just as good as the ford injectors that are talked about for a swap. My suggestion is to have them professional cleaned. Mine cost about 130.00 to have done. I have a borla header. The only problem I have with it is when the left front tire drops into a hole/ditch etc. and all the other wheels are on same level of road the front driveshaft hits it. Grant it it has to be a big hole, but I think other headers might have a better design. That would come down closer to the oilpan. Then again my junk could be messed up. My2c.
12-29-2009, 10:23 PM
#3
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Year: 2000
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Engine: 4.0 litre
12-30-2009, 02:03 PM
#7
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Year: 1997
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would this be a good header for the price? This is from Rockauto.com
Related Parts1997 JEEP CHEROKEE SPORT 4.0L 242cid L6 MFI (S) : Exhaust : Exhaust ManifoldPriceCoreTotal
ATP Part # 101212 
{#4883385}
Improved Aftermarket "Y" Design Collector
$183.79$0.00$183.79
Related Parts1997 JEEP CHEROKEE SPORT 4.0L 242cid L6 MFI (S) : Exhaust : Exhaust ManifoldPriceCoreTotalATP Part # 101212 {#4883385}Improved Aftermarket "Y" Design Collector
$183.79$0.00$183.79
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12-30-2009, 06:06 PM
#9
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for injectors most people upgrade to either Dodge Neon Injectors or FMS 19lb/hr injectors.
For the neon injectors you need to get a specific p/n injector
For the neon injectors you need to get a specific p/n injector
Last edited by ZachsXJ; 12-30-2009 at 06:07 PM. Reason: cause I can son!
12-30-2009, 06:54 PM
#10
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Year: 1997
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ok thanks, i found the header on ebay and yes it was the exact same one for alot cheaper thanks!
About the injectors-what is it going to do for my jeep? how will it help?
About the injectors-what is it going to do for my jeep? how will it help?
12-30-2009, 07:02 PM
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It can help with your gas milage a bit. It doesn't change the amount of fuel the Jeep gets it just changes how that fuel is dispersed. From what I know all cherokees came with single hole spray injectors stock. the FSM 19lb or Neon injectors are 4hole spray so the fuel vaporizes and burns better. I have FSM 19lb injectors on my XJ and I've noticed that in neutral it revs quicker and my gas milage went up by 1-2mpg. It also seems to have helped my available low end torque a bit.
12-30-2009, 07:03 PM
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Year: 1997
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Ok thanks Zacksxj, I will definately put the FMS 19lb injectors on my jeep sometime soon. Sounds like a good upgrade! 
12-30-2009, 07:05 PM
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I'd recommend Neon injectors. FSM work and work well. I would've bought a 2nd set of 4 Neon injectors if I hadn't gotten such a good deal on the FMS 19lbs I have in it now.