Garrett Advancing Motion - Turbocharger G-Series G25-660 54mm
Horsepower: 350 - 660
Displacement: 1.4L - 3.0L
- G SERIES COMPRESSOR AERODYNAMICS FOR MAXIMUM HP
- 54mm TURBOCHARGER COMPRESSOR WHEEL
- 79% MAXIMUM COMPRESSOR EFFICIENCY
- MAR-M ALLOY TURBINE WHEEL RATED UP TO 1050° C
- NEW TURBINE AERO PROVIDES HIGHER FLOW AND EFFICIENCY
- STAINLESS STEEL TURBINE HOUSINGS RATED UP TO 1050° C
- OIL RESTRICTOR AND WATER FITTINGS INCLUDED
- FULLY MACHINED SPEED SENSOR AND PRESSURE PORTS
- TURBOCHARGER ASSEMBLIES ARE CALIBRATED WITH A 0.5 BAR ACTUATOR
- Read About Turbo System Optimization: A guide to setting up your turbocharger
- The maximum power stated for each turbocharger has been calculated based strictly on choke flow of the compressor map (total turbo capability), which represents the potential flywheel power. Performance results of this product are highly dependent upon your vehicle’s modifications and tuning/calibration. Please consult with your local distributor before making a purchase.
The most powerful small frame turbocharger on the market
Introducing performance out of a package you never thought possible. This clean sheet product is tailored to meet the demands of hard core racing enthusiasts while providing industry leading power capability in a small package.
The G-Series G25-550 and the G25-660 turbochargers are compatible with 1.4L – 3.0L engine displacements and capable of producing up to 550 and 660 horsepower. G Series 25 turbochargers are smaller and outflow all comparable products on the market.
New compressor and turbine aero combined with high temperature resistant materials allowed engineers to push the limits of performance.
A new name designates a new generation of industry leading technology and innovation.
Understanding the Name:
G25-550 || G25-660
G designates 81 years of Garrett® heritage.
25 classifies the size of the frame. The remaining 3 digits identify the max horsepowerrating of the turbocharger. (ie 550)
Forged fully-machined compressor wheel and new aerodynamics increase maximum horsepower output and boost response. The CFD (computational fluid dynamics) engineered compressor wheel increases air flow up to 15% for 60mm and 30% for 67mm with 79-80% efficiency. (Compared to GTX GenII)
Available in standard rotation and reverse rotation options for enthusiasts that want the perfect twin turbo installation or a single reverse rotation turbo for applications with installation restrictions.
The compressor housing features a fully machined ported shroud to help reduce compressor surge. A fully machined speed sensor port provides enthusiasts the option to add the new G Series speed sensor to measure turbocharger shaft speed, a key factor in determining ideal operating conditions.
The new speed sensor is easy to install and does not need to be adjusted for length like previous sensors. Simply remove and plug, then insert the speed sensor and tighten the bolt. The new speed sensor is sold separately and is not compatible with GT and GTX sensors due to the new design and sizing.
The addition of an o-ring between the compressor housing and backplate reduces the possibility of boost pressure leakage.
A new one-piece center housing and backplate increase durability and product safety by reducing the number of failure points associated with the turbocharger. The center housing to turbine housing v-band connection allows for 360 degree orientation when installing with Garrett® non-wastegated turbine housings.
Four large water jacket ports increase cooling capacity and allow enthusiasts to customize water line routing to help improve the installation process. The turbocharger comes with two -6AN water fittings and two plugs.
*Recommended to install waterlines on opposite sides of the housing.
A single stage oil passage directs pressurized oil to the new oil cavity ensuring proper bearing lubrication at both sides of the cartridge.
Each turbocharger includes (1) -4AN oil restrictor fitting with a 1mm orifice to provide the turbo with the recommended 40psi of oil pressure.
Rotating Group- twin piston rings
A shorter bearing cartridge allows us to incorporate twin piston rings on both sides of the shaft wheel assembly. This will reduce the likeliness of oil leakage at the seals from the center housing to the compressor and or turbine stage.
Turbine Wheel Aero
The turbine wheel features all new aerodynamics to improve flow and boost response. The new turbine wheel is made of Mar-M super alloy and is capable of handling exhaust gas temperatures up to 1050 degrees C.
The new turbine wheel flows 15-20% more than GTX and has peak efficiency of 74%.
All G Series Turbine housings are made from stainless steel to provide ultimate durability and temperature resistance up 1050 degrees C.
Internally wastegated housings are compact, efficient, and designed with maximum bypass port size to reduce boost creep and provide better boost control.
Turbine housings are available in a variety of wastegated and non-wastegated, open volute, T25 and Vband configurations so be sure to order the correct part for your application.
Our team at Bleeding Tarmac is working hard to offer you the best prices and the lowest shipping cost. Because we are offering products at MAP, we unfortunately have to charge shipping fees on some items.
Honesty is the best policy - Let's be honest, shipping is not easy and can be pricy. Here at Bleeding Tarmac, we will not hide shipping cost in sale prices. Our automated check out service provides the best estimate, but don't be shy and contact us to get the lowest shipping quote possible.
If you have specific shipping needs, please contact us before ordering.
Oversized, overweight and/or special items may require additional shipping fees and include, but are not limited to : rollcage kits, batteries, seats, tires and wheels. You will be contacted with the actual shipping charges before your order is processed.
Where do we ship?
We ship to all states located in the continental US.
We do offer shipping to other states or Canada but quotes will be provided on demande only.
Order as early as possible if you want same day shipping.
Order products usually ship within 1-3 business days.
Rally Innovations Rally Light Bars that are in stock will within 3-5 business days. Some products may take longer and we will make sure to contact you if it's the case.
Broken Motorsports products shipping delays vary and we will contact each customer.
To accelerate the shipping process, parts will be shipped from remote warehouses located throughout the United States. Orders may ship in multiple boxes and/or from multiple carriers.
Special orders or out of stock items may take longer and we will inform the customer by email once we have a estimated delay.
Items are carefully packed and sealed to prevent damage in transit. Loss or damage claims must be taken up with the carrier. If a shipment is lost, mis-routed, or damaged we will start an investigation with the shipping carrier. Replacement items cannot be sent until the shipping carrier completes their investigation.
Fluids & Fire Suppression Systems
Shipping restrictions apply to all fluids and fire suppression systems. These items will only be shipped by ground.
ADDED Shipping fees might be required after ordering BRAID WHEELS.
Because of the container shortage and unreliable delays of maritime transport, we only drop ship wheels directly from the manufacture in Spain at the moment.
Shipping fees calculated at check out are ESTIMATED only.
Customer will be contacted after completing the order, BUT before we process payment, to confirm availability, shipping options, and rate.
** Return & Cancellation are usually impossible since most wheels are made to order. Cancellations are ONLY possible if made BEFORE the production begins. Please contact us to verify if anything is possible. **
Unless in stock, order lead time : 4 to 10 weeks
Longer lead times apply during the rebuild season.
Samsonas products are often customized for your car and are shipped from Europe, therefore lead times can vary and occasional delays can occur.
Please order with plenty of time in advance.
Cancellation fee 25%
All Rally Innovations products requires a signature on delivery.
In stock Items will be shipped within 5 business days. Customer will be contacted if shipping delay is expected to be longer.
We reserve the right to charge a 5% cancellation fee for higher dollar orders.
Cancellations may be allowed under certain conditions. Once the order has been packaged and a tracking number has been created a cancellation will not be allowed. Special order items cannot be canceled at anytime once the order is processed.
If you refuse or return your delivery, the buyer will be responsible for the original shipping charges. Exchanged items will be charged shipping fees.
Our team is here to assist you in your purchase. Please take advantage of our knowledge before you order.
Within 30 days from the receipt of you order, certain items can be approved for return if unused, uninstalled, undamaged, and in the original packaging. Items must include all hardware, instructions, tags, or other original included accessories.
All returned items must be approved and issued an RMA number (returned merchandise authorization). No credit will be issued without a RMA number.
Items must be properly packaged for shipping. We reserve the right to charge a restocking fee or decline issuance of credit for damaged retail packaging. Customer is responsible for return shipping fees.
Please use a trackable service for you return such as UPS, FedEx, or certain USPS services. Return shipments should be insured for the proper amount. Bleeding Tarmac will not be held responsible for returns that are lost or damaged in shipping.
Once the item is received and inspected, a credit will be issued. Refunds may take 3-5 business days to post on your account.
All refunds are subject to a processing and/or restocking fee.
No returns on the following: Special order items, any electronic components, helmets, clothing articles, items considered clearance or close-outs, or items with special pricing, are final sale and may not be returned.
Apparel and promotional items
All apparel and promotional items, including hats, t-shirts, sweatshirts, stickers... are final sales. No returns, exchanges, or refunds will be issued on these items.
We offer no warranty above that of the manufacturer of goods sold. In an effort to minimize legalese we offer the following statement. Each brake parts manufacturer warrants it's goods to be fit and free from defects in materials and workmanship. This is quite limiting. Any warranty above and beyond that is strictly on a case by case basis and limited to replacement of equal value only.
Coupon codes can only be redeemed at the time of purchase. Once an order is placed we will not price match any other competitors, all price matching must be negotiated before an order is placed.
We reserve the right to refuse any order for whatever reason, without being liable for any damage or costs.
Most products on our websites are designed for off-road use, and to be used at the purchaser’s own risk and discretion. Bleeding Tarmac, Broken Motorsports, or any of its companies are exempt from any liability, and will be held harmless for any damage incurred, either property damage or personal harm, by the use of any of these products, whether being used for off-road use, or for use on public roads. While some of these products may be legal for use on public roads, Bleeding Tarmac, Broken Motorsports, or any of its companies do not endorse, authorize, or sanction their use on such public roads.