The Game Changer Lite turbo upgrades bridges the gap between a Stage 1 and the full Stage Game Changer setup. Vargas has engineered the GC-Lite to have faster spooling than the full kit so there is less lag and you can get into the boost sooner. The GC line is a fresh, ground-up design for the N54. Vargas has built this with a pair of Mitsubishi TD04L turbos with high flow 9-blade turbines mated to billet 16T compressor wheels. Vargas has targeted near stock levels of spooling without sacrificing top end power. They do this by increasing the area inside the manifolds, turbine, and compressor housings. Between the full GC and GC-Lite kits, the Lite has less peak power but better drivability. These turbos are rated up to 650whp.

Other GC-Lite features -

• Upgraded thrust bearing
• Billet aluminum compressor wheel
• Stainless steel housings
• Stainless steel wastegate arms
• Silicone inlet and and charged air manifold to FMIC

Inlet and Chargepipes - the Game Changer turbos require the use of Vargas silicone inlet pipes and the manifold from the turbos to the intercooler (FMIC). The stock inlet ducts are made of plastic and very small diameter for making big power. Likewise, the hotside chargepipe is also undersized and a poor design for flow. Vargas upgrades these with larger silicone pieces that not only flow more air but are also a lot stronger for the kinds of boost this kit can produce. The stock inlets and hotside chargepipe will not work with the GC turbos. For the inlets, select the type of boost relief you are using - the stock diverter valve or an aftermarket blow-off valve.

Fitment to FMIC - an upgraded Front Mount Intercooler is required with this N54 turbo setup (the stock FMIC is not up to the task). Since there is no standardized connection for intercoolers, you will need to make note of which type you have an order the appropriate adapter from our options below.
Option A (+$25) - 2.5" and 90* turn up from the intercooler (CPE, AA, ER Sport, CXRacing)
Option B - 2.5" and angled up from the intercooler (AD Engineering, ETS, Helix, Cobb, ER Compeition)
Option C (+$25) - 3.0" and angled up from the intercooler (VRSF)
Option D (+$25) - 2.75" and angled up from the intercooler (Wagner EVO)
Option E (+$50) - 3.0" and straight out from the intercooler (AA Race)
Option F (+$25) - 2.5" and straight out from the intercooler (Forge)
Option G (+$15) - 3.0" and straight up from the interooler (AMS)

Install Kit - an Install Kit is also offered that includes all of the additional parts and pieces that will need to be replaced during this install (gaskets, hardware, etc).

135/1M/535 Fitment Note - the rear turbo in the Vargas kit is designed for the 335. A different coolant line is required for fitment on 135/1M and 535. You can source the coolant line on your own (BMW #11537558902) or add one to your kit below.

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.

Diverter Valves or BOV are not included in this kit. You can use stock DVs with this kit or switch to an aftermarket BOV setup.

WHP rating: 650. 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 N54 tuning is required to match these turbos with your existing mods and upgrades.

Looking to go big single turbo? Now you can with this Vargas Turbo N54/N55 flange. Designed to give you the ability to go big single, Vargas Turbo has done it again. Available in mild steel or stainless steel, this flange is perfect for anyone who's looking to step apart from the norm and look to make big power.

Starting in 1978, Vargas Turbo Technologies was built upon the dream of utilizing then-new turbocharger technology to improve the performance of everything from cars to boats. On the cutting edge since the beginning, the company has grown with the industry, servicing diesel and industrial turbochargers. Returning to their hot-rod roots, Vargas has jumped head-first into the BMW performance market, filling a need for high-quality, cost effective turbocharger upgrades for everything from daily-driven street cars to all-out racing machines.

Turbo maintenance has become part of our daily lives here. Our Service department does several turbo overhauls, wastegate adjustments, carbon cleaning, and upgrades every week. For the DIY owner, however, having a complete overhaul kit takes some of the stress out of 335 turbo replacement and this kit includes all of the basic items. It's highly likely N54 turbos will have to be replaced before 100,000 miles. Signs of a failing turbo are high oil consumption and blue smoke from exhaust (not from a leak or failing CCV system) because the internal oil seals are no longer retaining oil. Without critical lubrication and cooling effects from oil, the turbo shafts and bearings are usually the first to wear and that requires a complete rebuild. You might also see increased turbo lag or failure to hold boost, which is usually a sign of a failing wastegate or some other internal issue. With any internal problems the turbos need to be replaced. 

This package uses all Genuine BMW parts. It includes everything that needs replacement during a 335 N54 twin turbo overhaul -

• Front and rear Genuine BMW rebuilt turbos
• 1 gallon of Genuine BMW coolant
• ​16 - ASA M7x39 studs
• 16 - Flange nuts
• All required gaskets and o-rings
• Water pump install hardware
• Replacement vacuum hose
• T-bolt clamps

BMW rebuilt turbos have a two year warranty.

Each turbo has core charge each that will be refunded once your original rebuildable turbos are returned.

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.