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They do improve horsepower, but mainly at the peak where you have the highest airflow. Most people aren't driving near that point for very long, especially in a Wrangler. Most vehicles designed in the last 10 or 15 years provide very little benefit with induction and cold side exhaust...

I wouldn't dive into the engine just to make this change, but if you were changing anyway might as well go with the JL units. 8 vs 4 hole is directional correct for fuel atomization but agree with @Chris that for our engines you won't see any real benefit. Lower cost is always good, though!

I found someone selling their OEM JK Rubicon shocks on Marketplace and gave those a shot. He had removed them after a few thousand miles and they were sitting in his basement ever since. Had no reason not to believe him as they looked new. An improvement over the Sahara shocks. Around...

True regarding horsepower, but the OP mentioned he wanted a more aggressive sound than stock. A cat back can fulfill this want. I don't have any first hand experience but I know others on here have done this.

Welcome @Rockcrawler02 ! @pc1p has been taking us through his axle builds on his build thread. He may have experience-based opinions for you...

LH (driver's) head seems to be the most problematic. You can also do a leak-down test to see if it's both sides or just one. Sometimes it can be can be difficult to get definitive results with the scope. Other times it's obvious.

Wow, that is definitely worth considering!

Time is a one factor here... Is this an extra vehicle or your primary mode of transportation? Money is the other. What will they give you for a trade-in offer? You can then compare this to having it fixed and then selling it on the used private-party market. Let's say you can get $20k...

I installed a twin ARB on my SuperDuty and would love to have the same on the Jeep. Totally unnecessary but nice when you need it!

I would also remove the belt and check all the accessories for noticeably high friction/resistance. My guess would be either the alternator or A/C. Alternators can really start to smell like they're burning when they're going bad. This coupled with the belt rubber getting toasted could be...

Having the knowledge and experience to do this yourself is huge! I've had regears done in several vehicles but never attempted it myself.

Did this start with an overheating issue or was that a result of a water pump (or other part) change? I would do a combustion leak test on the coolant if you haven't already.

It will only have 3.73s if that option was selected. 3.21s are standard regardless of Sport or Sahara. You can verify with a VIN lookup to get the original window sticker or the feature content from Jeep.

I purchased from a local dealer. They agreed to the assessment using their own service dept. and included a powertrain warranty with the sale. It was only 3mos but gave me a bit more peace of mind that there wasn't any ongoing issues with it. They actually had it competitively priced vs...

Unfortunately the issues trickled into other years. Mine is a 2016 but I negotiated the sale based on a positive result for compression and leak down. Something you may want to think about to ensure you don't purchase one with early signs of degradation.

You'll want a later model year (15-17) to stay clear of the head and rocker/cam issues.

Be sure to show us some pics when you make the change!

I don't have a direct answer for you but will await a response as I've considered this size long-term once I install a proper lift. My guess is that you wouldn't absolutely need spacers but may have a bit of rub at full lock unless you add some washers to limit the steering (similar to running...

Are you talking about the the plastic tray inside the vehicle in front of the shifter? That's a new one for me.

Yep, Gates belt. I am going to try the water test again and also look at the crank pulley to see if there are any signs of the elastomer shifting. I have read about misalignment issues stemming from this.