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Why stop there? Dual 3.5" custom exhaust would be even better, right? Especially with double X pipe. If you want to spend 2 grand to gain no horsepower, you need to look at Ersatz Bros tuning products here: https://www.explorerst.org/threads/jk-performance-products.2906/post-36551

No, it gives me the biggest gut pain in the world as I had to sell it to fund the "divorce" :cry:

My '94 Subaru Impreza Wagon. With a JDM STI v7 drivetrain. The ultimate sleeper!

My '94 Supra. Twin turbo six-speed.

I'm not an audiophile, but I'm curious. Your posts have mentioned volume being something you've measured. Is there some connection between the diameter of the woofer and the volume you need behind them for best sound?

If the fan speed was completely automatic, there would be whinging about it not being adjustable! "It's too slow, it's too fast, Ford tried to save a buck, why can't it be adjustable?." It's not like pressing a button is that difficult....is it?

Most octane boosters are based on toluene (or xylene) and MMT- a different product than the lead used in the olden days, but I wouldn't run it in my vehicle on a long term basis. It's just not a viable option for catalytic converters long-term. Not to mention, how are you going to truly...

First that comes to mind is a possible pebble between rotor and brake pad. Look for scoring on the rotor.

I have a little experience with making custom parts and followed unbroken's A-pillar speaker mounts with interest. His workmanship is excellent, however I think if you look at building small custom parts that don't require aircraft strength, it's easier to use polyurethane foam. They can be...

If you got into wheel hop and let off, it could definitely throw an overboost code. Next, I'd check the diffy stiffy and see if the slotted mounting holes show movement.

It's somewhat gratifying to see that those transitions in the exhaust and aero disproves that all Asians are better at math. And a bit terrifying.... :oops:

Thanks, missed that in reading the posts. Sadly, I just can imagine anything that would help unless you added bodywork that somehow extended the rear transition by a couple of feet or more! Thank goodness for a rear wiper/washer.

I have no doubt Adam knows what he's talking about- certainly once you're tuned he can probably tweak some things to net you more hp. All I'm saying is that temps have a much bigger role as you noted in post #400. I would also expect that if the air filter was reducing the pressure drop, this...

The pressure drop would be roughly proportional to the mass airflow. Just an airbox (or even just remove the filter) will not add 30hp to a stock engine. No way. As far as tuning, a COMPLETELY stock ST with a good tune will add 90+ hp on gasoline. So adding a tune is apples/oranges. Don't...

You're certainly right that you'd need a higher pressure area to deal with dirt problems, but when you post "people claimed it eliminated the dust build up". I'm not sure what you meant by "it". The problem with the ST (and most other SUVs) is the sharp transition of 70-90 degrees from the side...

It's about aerodynamics. To make it simple, the rear of the vehicle is a low pressure zone. All air passing over the sides and top are going to slow down at that transition and start to swirl- depositing whatever dust is tagging along on the back panels. You'd need some aero help in some form...

Another incredibly informative post. I know that I along with others look forward to to your input.

There's a lot of bitching about the subframe. It's overblown. If you tune your vehicle and blow up the diff, then I'm sorry, in my mind you added another 100 hp to your car and expect Ford should just cover it? Really? If you don't tune it, how many have broken? Probably none. And I'm sick...

It has an open front differential, just like the ST. So no, both front wheels will not spin. However, it does have the Torsen rear, so you see both rear wheels spinning. And the guy in the video- moron.

That message shows up if you use the brake while still engaging the accelerator. It could be an anomaly, but you can look this up on the internet in various Ford forums and view the reason. Does your wife use her left foot to brake? Does she have abnormally sized feet? If not, it could also...