Are short headers legal?

The long-tube header eliminates the catalytic converter (on some applications), making it illegal for street use on many cat-equipped vehicles. The shorty retains the OEM cat(s), therefore, it can be made legal in all 50 states.
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Can I pass smog with shorty headers?

I had asked questions about shorty headers and was told not to waste my money since they will not result in much gain in horsepower. They will however pass smog inspection. It's not that the Long Tube headers won't pass emissions.
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What will shorty headers do?

Shorty headers perform best in the idle to mid-RPM range. This makes them the perfect headers for vehicles that rely on low-RPM power, like a daily commuter or a work pickup that sees a lot of towing and hauling.
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Will shorty headers throw a code?

Won't throw codes because the stock cats are left in place. Thing is though shorty headers by themselves will do very little for performance or sound over the stock manifolds.
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Do shorty headers add horsepower?

How much hp do shorty headers add? On a stock engine, around 3 hp above the usual.
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Are shorty headers worth it?

If you're driving a turboboosted engine, you will absolutely want shorty headers, but they're also great for a variety of other drivers. If you're looking to increase the performance of a vehicle that's primarily your daily driver or commuter, shorty headers are a good idea.
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Whats louder short or long headers?

Shorty headers aren't as loud as long tube headers, although they'll definitely have better sound than your stock manifold. You can choose unequal length headers for better sound, but equal length is the way to go for consistent gains in performance.
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Do headers turn on the check engine light?

yes they do

A tune is a must after header change, especially if u want to pass smog.
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Will shorty headers make exhaust louder?

Yes they will make it a little louder, but not a significant amount. The tone will change and it will sound much more "tinny". If you leave your stock mufflers you will not have a problem, but if you do a cat-back it may get too loud for you.
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Are shorty headers better than stock manifolds?

Shorty headers do have a place in the line-up. In our second test with the mandrel-bent pipes they posted 1 hp better than the RARE manifolds and 3 better than the Performance Years pieces. They are much lighter than the manifolds and will provide some sparkle under the hood with HTC coating.
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What headers give the most horsepower?

Medium and long-tube headers allow an engine to make more horsepower at high rpm.
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Do headers pass inspection?

Here in California most long tube headers are not allowed and would probably fail the visual inspection. It probably depends on the emmisions requirements for your state. Some states (like California which is probably the most restrictive) are much more restrictive than others. This is very true.
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Are short tube headers legal in California?

Well-Known Member. "Legally" there are NO long tube headers that are smog legal in CA. The reason is, the cats have to be in the stock location, and obviously that isn't possible with a long tube header. You can have legal shorty headers because the headers stop before the cat, and the cat remains in the stock location ...
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Do headers make your car sound deeper?

Car headers do not make your car louder as compared to the stock exhaust manifold. This aftermarket addition is used to improve the performance of your car and give you a cleaner-sounding exhaust.
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Are headers worth it?

In general, a quality set of headers should provide an increase of approximately 10-20 horsepower, and if you're restrained with your right foot, you may even see an increase in fuel mileage.
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Will long tube headers cause check engine light?

Long tube headers almost always throw the check engine light. If there are any tuners in your area they can just turn the rear O2 sensors off.
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How much HP do headers add?

The aftermarket exhaust header added about 4 hp on its own and broadened the car's power curve. So, it didn't add much power, but it added it across the board.
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Are long tube headers loud?

From experience, it is really loud.
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Do headers replace exhaust manifold?

Long Tube Headers

It varies from car to car, but generally they replace your OEM exhaust manifold, a downpipe and catalytic converter.
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How hot do long tube headers get?

It can run up to 400 to 500 degrees if you were running a steady 65 MPH.
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