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Vargas Stage 1 N55 turbo upgrade is good up to 425whp with proper tuning and high grade fuel. Vargas N55 turbo is an all-new turbo specially made for Vargas. They build it with a billet compressor wheel of their own design and a stock turbine. It will accept all of the stock water and oil lines and the original diverter valve (upgraded DV is recommended). This kit is a direct bolt-on replacement for the original turbo and necessary if you want to start making big power from the N55.

The stock plastic diverter valve and chargepipe is the weakest point for boost leaks (the plastic cracks). Vargas Turbo recommends upgrading it to a stronger DV design. The aluminum DV designs will hold up to just about any boost level currently available.

Vargas Turbo Technologies has been in business since 1979, offering rebuilt and re-engineered turbo solutions. For the BMW market, they identified a need for both cost-effective turbo replacements and proven turbo upgrades. It's recommended that the rest of the system be upgraded to handle your tuning goals. The final Vargas rebuilt turbos are better than the factory rebuilds and at a lower cost!

Oil Recommendation - modern engine oil is formulated for emissions and to be environmentally friendly. The additives in current oil lowers the oil's ability to withstand high temperatures and stresses, lowering its shear strength and its lubricating properties. Vargas recommends oils with high ZDDP (zinc and phosphorus) content that will better protect and cool the turbo bearings. Examples of high-zinc oils are Red Line Race, Red Line Euro, Motul 300V Racing, Joe Gibbs Racing, Valvoline VR-1 oil, and most Diesel-spec oils that you can buy off-the-shelf. Some oils, especially the Race type, will need more frequent oil changes and may be harmful to catalytic converters.

WHP rating: 425. This rating is used to compare various stage of Vargas turbo kits. There is no advertised horsepower gain with this kit as it depends on your other mods and tuning. The rating is provided as a reference to use in your tuning planning. Custom tuning is recommended to match thIS turbo to your existing mods and upgrades.

BMW N54 CTS TURBO BOV PIPE (TIAL FLANGE) is the ultimate upgrade for your BMW's N54 engine, designed specifically for use with the TiAL Q atmospheric blowoff valve. Offered by Turner Motorsport, this CTS Turbo BOV kit includes a 3" mandrel-bent T6 6061 aluminum pipe, finished in a durable black powder coat for long-lasting performance and sleek appearance. The kit ensures a secure fit with 4-ply silicone connectors and stainless steel clamps, providing an OEM-like fit with an aggressive aftermarket sound. Additionally, the pipe features two water-methanol bungs with 1/8" NPT plugs, a CNC machined MAP sensor flange, and a laser-etched CTS Turbo logo. Replace the weak plastic charge piping and failure-prone diverter valve system with this high-quality upgrade, enhancing your ability to hold boost under heavy loads while adding a distinctive sound to your BMW.

• Designed for use with TiAL Q atmospheric blowoff valve
• Durable 3" mandrel-bent T6 6061 aluminum pipe with black powder coat finish
• CNC machined MAP sensor flange for seamless OEM installation
• Includes 4-ply silicone connectors and stainless steel clamps for secure fit
• Features two water-methanol bungs and laser-etched CTS Turbo logo
• Enhances boost holding capacity and provides an aggressive aftermarket sound

If you're not sure if your Vanos seals are bad then the only question you need to answer is if you've replaced them. Every unit from the factory came with the same failure prone o-rings and seals, even the re-manufactured units you can still get today. The only real fix is by replacing the seals and o-rings with material that is built to last in the oiled, extreme temperature environment found in these kits. 

A premium product replacement with easy to follow instructions makes rebuilding your Vanos unit a must. Even thought the power loss is barely felt it's the opposite result once you replace the seals, every car that gets rebuilt ends up wowing the customer and all of them saying they didn't realize what they lost. 

There are a number of symptoms that will plague your car as a result of these failing seals such as erratic idle, engine hesitation, stalling, and increased fuel consumption to name a few. If you've been chasing down any of these symptoms with no fix then this could be your issue.

This kit includes all the right seals and tensioner's for a thorough top end rebuild, this is the best way to rebuild the top half of your engine so you don't have to dig in there again and you can just enjoy the drive.

This item fits the following BMWs: 
1999-2001  E38 BMW  740i 740il 
1999-2003  E39 BMW  540i 
1999-2003  E53 BMW  X5 4.4i X5 4.6i