Automotive Parts Network APN 4.0L headers Reviews, Ratings, Specs & Prices
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Automotive Parts Network APN 4.0L headers

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Product Information

Average Price: $167.58
Manufacturer: Automotive Parts Network
Yes: 15 / No: 3

Great replacement headers, 129$. Easy to put on with instructions. Changed the exhaust note for the better too, dropped the chaotic high pitch at high RPM shift. Really smoothed out the tone threw all RPMs.


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Registered User
torkman's Reviews
05-07-2014, 10:35 PM
Price: $200.00
Pros: Added some bottom end torque.
Cons: Had to make them myself. Also had to notch out and plate the passenger side frame to get them to fit and for clearance issues.
Recommended? Yes

Comments: I wasn't going to pay what everyone out there that had them, which was very few so that's why I made them myself.

Registered User
muttly's Reviews
04-19-2014, 09:47 AM
Price: $180.00
Pros: good price
Cons: had to do some minor fitting
Recommended? Yes

Comments: overall a good product for the price

Cobra Jeep
Registered User
Cobra Jeep's Reviews

01-05-2014, 10:19 AM
Price: $179.85
Pros: Cheap, looked ok at first inspection
Cons: Cheap, ports did not line up with gasket and head, had to hammer/dent the # 6 tube to clear the intake. Cracked after 6 months
Recommended? No

Comments: Bought this from amazon to replace my cracked factory manifold. I had rewelded it and it lasted another 10 years before it cracked again. I bought this one thinking it looked like a decent replacement. Once I got it, I set a new fel-pro gasket up to it and all but two of the ports did not line up. Most were off by 1/8in or more! Other than that, it looked ok. I took a die grinder and fixed the ports best I could. I didnt have enought time to return it for another as I had the jeep torn down already. I installed it and had to hammer the #6 tube to clear the intake. Cheap POS!
Here I am, probably 6-8 months after installing it and it has cracked! Also, this so called "stainless steel" started rusting after about a month.


Registered User
rvsguitar1's Reviews
11-05-2013, 10:17 PM
Price: $300.00
Pros: MOME
Cons: CRACKED after 1.5 years of use
Recommended? No

Comments: Cracked after 1.5 years of use!

Registered User
Gcallaway's Reviews
08-23-2013, 01:45 AM
Price: $180.00
Pros: slight power gain, good exhaust note
Cons: Had to do some grinding to fit
Recommended? Yes

Comments: Welds cracked after 6000 miles, Rock Auto made good with no hassell, but had to pay $33 return shipping we'll see if the 2nd one holds up better. I have good engine and trans. mounts, exhaust not in a bind and was mildly offroaded, looked liked sorry Chinese welds to blame.

Registered User
95_xj_country's Reviews
02-09-2012, 07:16 PM
Price: $129.00
Pros: good for price. better then stock. little more power too
Cons: nothing really
Recommended? Yes

Comments: was easy to put on, bolted right on. i got a little more power too

Registered User
mbardeen's Reviews
09-14-2011, 07:25 PM
Price: $150.00
Pros: Drop in installation. Bolted right up with no problems
Cons: None
Recommended? Yes

Comments: This was my first major header install. It came with the gasket and hardware. It took my an afternoon to install, and everything bolted right up with no modifications. The welds look hefty and unlikely to crack.

The sound around 2500-3000 RPMs is intoxicating. I had hoped my gas mileage would get better, but I doubt it will -- the sound makes me want to step on the skinny pedal.

Can't say if there's many more ponies there, since my old manifold suffered from the 4.0 crack..


Registered User
klrstew's Reviews

07-14-2011, 01:30 PM
Price: $165.00
Pros: Cheap, Great quality and came with a gasket
Cons: None to speak of
Recommended? No

Comments: After reading a bunch of reviews and searching the web I finally decided on this one. I had the money for one of the Bigger named brand ones, but went with this. I couldn't be more happier. It was a decent install, had a little difficulty getting it into place (just like any header), but once I found the sweet spot popped right in. And, with the money I saved i got all new pipe front to rear and a new Thrusher muffler to boot.


Registered User
manicjester3's Reviews
05-24-2011, 11:21 AM
Price: $160.00
Pros: Cheap, 321 Stainless, lifetime warranty
Cons: None so far
Recommended? Yes

Comments: Cheap header, solved my cracked header issue, lifetime warranty, fast shipping.

Registered User
thebeast64's Reviews
04-12-2011, 05:27 PM
Price: $149.99
Pros: Sounds amazing, increased throttle response and more torque.
Cons: Hard to install. LOTS of grinding involved.
Recommended? Yes

Comments: I had the infamous cracked manifold problem associated with the 4.0 so I finally pulled the trigger and bought the APN header. It came very quickly and had all of the parts in the box. I took my time labeling everything during the tear down so that everything would go together smoothly. And it did, all except for the intake manifold, which I had to grind around 1/8th of an inch off of the outside of each port in order to get the thing to fit. Oh and DEFINITELY do step 2, even if you feel like you can fit the bolts in after the intake is can't.

Registered User
T4STE's Reviews
01-12-2011, 11:46 PM
Price: $150.00
Pros: price is great. comes with gasket
Cons: some grinding off the intake manifold on some vehicles
Recommended? Yes

Comments: great replacement over stock manifold. some may notice some gains in the ponies

Registered User
wvpv's Reviews
12-07-2010, 08:43 PM
Price: $160.00
Pros: works well, cheap, sounds cool
Cons: Need to modify intake manifold to make it fit
Recommended? Yes

Comments: I installed this on my jeep shortly after buying it. Replaced cracked stock manifold. In order to make it fit I had to grind a hole between #4 and #5 tubes on my intake manifold, also had to grind outside tabs a tiny bit. This header sounds awesome. I can't really compare it to a stock manifold performance wise as my factory one was cracked. If this on breaks I will try the ebay manifold with the expansion tubing.

Registered User
muttyranks's Reviews
11-09-2010, 08:41 PM
Price: $139.99
Pros: can't beat the price and well made
Cons: bitch to put on...have the grinder handy
Recommended? Yes

Comments: great replacement for the cracked exhaust manifold. not bad to put on, but needed to grind part of the intake manifold for these to fit on my 99 xj.
sounds great with the hi-flow cat and flo-pro exhaust.

Registered User
mojog's Reviews
10-20-2010, 11:42 PM
Price: $140.00
Pros: cheap
Cons: none
Recommended? Yes

Comments: Awesome, no more spiff spiff noise from under the hood!

Registered User
T4STE's Reviews
05-03-2010, 09:18 PM
Price: $140.00
Pros: better design, stronger metal, GREAT PRICE
Cons: cant get to my door quick enough
Recommended? Yes

Comments: awesome product for a great price. if you still have the stock manifold, then replace with this immediately

Registered User
ElGuapoBond's Reviews
12-11-2009, 04:46 AM
Price: $100.00
Pros: Repairable with expansion joints and stainless...
Cons: none
Recommended? Yes

Comments: This is your generic stainless exhaust manifold with expansion joints commonly found on EBAY for a reasonable price and included new gasket and exhaust donut.


Registered User
DeansWings's Reviews
08-15-2009, 04:17 PM
Price: $225.00
Pros: Sounds real mean. Mildly sharper throttle sponse which a big boost on high end performance
Cons: Pain in the rear to install
Recommended? Yes

Comments: I'm not sure if this header is the one I got, as I got them off ebay. Mine is 1 5/8" stainless steel. The high end performance increase and sound were very obvious. Definitely a good investment, especially since the stock exhaust manifolds are notorious for cracking

Registered User
fourhiandfly's Reviews

07-07-2008, 02:28 PM
Automotive Parts Network APN 4.0L headers
Pros: Cheap, looks like Banks reject
Cons: Tight fit, fat ears, tough to get to one stud
Recommended? Yes

Comments: I installed this in April, so far so good! Nice sound Great price! No fabrication needed (by my chinny chin chin). Ears are large and barely mated with intake.
I am very happy so far!!!

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