Both of these systems are more expensive because they not only provide the filter, but also provide the intake tubing. Halltech has two awesome full intake systems for the LS6: the Venom and the Killer Bee. The SLP filter bolts directly up to the stock intake tubing but eliminates the box, creating an open-air system and increasing air flow. The Blackwing power gains primarily come from the removal of the factory intake box. In our opinion, you likely won’t see these gains on a completely stock engine but nonetheless it is a great system for modified LS6’s. SLP claims up to 90% improved airflow and up to 18whp power gains. SLP’s Blackwing intake system is going to be the best bang-for-the-buck intake system for the LS6. Best LS6 Intake Upgradesįor those who are looking to upgrade their LS6 intake system, here are our favorite intakes: For LS6 owners, this is great news as you can sell the manifold and intake combo for near $1,000 to an LS1 owner and use that money to get an upgraded intake and manifold yourself. Unfortunately, GM has stopped manufacturing these intakes so the only way to get them now is to find them used. The LS6 intake and manifold bolts directly onto the LS1 and provides power gains of nearly 25whp and 20wtq. Additionally, the LS6 intake manifold is also a fan favorite for manifold swaps as well. Unless you are adding these mods you just don’t need more air than the stock intake can supply.Īs I mentioned above, the LS6 intake was built so well from the factory that is actually the most popular choice as an LS1 intake upgrade. We recommend upgrading your LS6 intake if you are also upgrading your intake manifold, cams, and heads. The intake manifold and heads can only hold and flow so much air so they quickly become the restriction. the intake is no longer the restriction on air flow. If you drop a huge filter into an LS6 with stock heads, a stock intake manifold, etc. If you are adding forced induction such as a supercharger or turbocharger you should absolutely upgrade the intake system.įor those not going the forced induction route, it depends on your modifications. While it might not make sense on stock LS6 engines, modded LS6 engines certainly have a better case for a cold air intake. Rather than dropping a full intake system in, you are best off dropping in a K&N or SLP filter. When you consider a good intake is $500+, it just doesn’t make sense to upgrade for the 2-5hp gains you will see, and the 5hp number on the high end is probably very optimistic. It is actually so good that a ton of LS1 owners swap LS6 intakes and intake manifolds onto their cars, in favor of aftermarket brands. The LS6 intake is actually built really well from the factory and has plenty of air flow. If you are just looking for a little bit of extra power on your LS6 I would recommend starting with long-tube headers and ignoring the intake as an intake won’t be worth its cost. To cut to the point, on a completely stock LS6 an upgraded intake has very few performance benefits. The stock system was built extremely well and provides Performance Benefits on a Stock LS6 An aftermarket LS6 cold air intake isn’t going to lower IAT’s (intake air temps) over the stock intake system. While these systems are usually called “cold air intakes” the true benefit comes from increased air flow. However, when you begin adding more serious mods, the intake becomes restrictive as it is no longer capable of pulling in enough air to supply the horsepower being produced. Most intake systems, as is true with the LS6, are completely sufficient at stock power levels and when lightly modified. Generally speaking, more power requires more air. The biggest benefit of an upgraded intake is improved air flow. With that being said, traditional bolt-on modifications like a cold air intake can be beneficial under certain circumstances. The biggest power gains on the LS6 will come from long-tube headers, upgraded cams, porting or performance heads, stroker kits, and forced induction. While these LS6 engines can handle a ton of power they aren’t quite as easily modified as forced induction cars. However, for you American Muscle folks looking for more power, a traditional cold air intake system might be on your mind. of torque, the LS6 was pretty stout from the factory for it’s time. It was used in the C5 Z06 Corvette’s and the first-gen Cadillac CTS-V’s from 2001 until 2005 when it was replaced with the LS2. The Chevy LS6 engine debuted alongside its little brother, the LS1, in 2001.
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