Takeda® - Retain Stage 2 Aluminum Polished Short Ram Air Intake System with Pro Dry S Gray Filter

2 reviews|Item # 377201437
In Stock
2008 Infiniti G37
Fits Following Model(s):
  • Coupe
  • This is a CARB compliant part, legal for use on vehicles built to meet CARB standards and/or registered in California and other states which follow CARB standards (CARB EO: D-550-16).
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Product Details

Infiniti G37 Coupe 2008, Retain Stage 2 Aluminum Polished Short Ram Air Intake System with Pro Dry S Filter by Takeda®. Improve your car's performance and enhance the appearance of your engine bay with the Takeda Retain Short Ram Air Intake System. This system will increase airflow to your engine with subsequent gains in horsepower and torque.

Notes: This is a CARB compliant part, legal for use on vehicles built to meet CARB standards and/or registered in California and other states which follow CARB standards (CARB EO: D-550-16).



Series: Retain
Filter Color: Gray
Tube Finish: Polished
System Type: Short Ram Air Intakes
Material: Aluminum
HP Gain: Up to 18 hp
TQ Gain: Up to 20 lbs./ft.
Replacement Filter: Pro Dry S # TF-9009D


  • Custom designed for each application
  • Increases airflow, for gains in horsepower and torque
  • Improves acceleration and throttle response
  • Easy to install, fits completely under the hood
  • High flow, oil-free, conical 360 degree Pro DRY S air filter
  • Comes complete with everything needed for installation
  • Can be installed in 30 minutes or less
  • Backed by a 2-year limited warranty


  • Air Filter
  • Intake Tube
  • Couplers
  • Hardware

The Retain Short Ram Air Intake System replaces your restrictive factory air intake system with a large, free flowing high performance Pro DRY S air filter and a mandrel-bent aluminum air intake tube. This system will dramatically increase airflow compared to the stock system, with resulting gains in horsepower and torque. You'll get improved performance you can feel. And this system looks so great; you'll quickly get into the habit of popping the hood to show it off!

The improvement starts with the Pro DRY S air filter, which combines high airflow and filtration efficiency with the convenience of oil-free maintenance. It contains 2 layers of randomly porous synthetic fabric, which allows approximately twice the airflow when compared to a typical stock air filter. The increased airflow results in more horsepower and torque, better throttle response and more miles per gallon. But this improved airflow and performance hasn't been gained at the expense of engine protection: the Pro DRY S has an excellent 99.2% filtration efficiency rating. The pleats in the filter are evenly spaced for greater dust holding capacity and the tips are rounded for better airflow. They're also 30% deeper than comparable aftermarket air filters for longer service intervals and greater dust holding capacity.

A specially developed 3-angle velocity stack smoothes the airflow transition from the air filter to the mandrel-bent aluminum intake tube. Unlike factory air intake tubes that have sound baffles and make awkward bends, the Takeda intake tube is designed to give the engine less restrictive breathing, incorporating larger diameters and smooth bends. The end result is the maximum possible airflow velocity. The intake tube is available in anodized black or polished clear-coat finish to add style to your engine bay.

The Retain Short Ram Air Intake System comes with everything needed for installation, including all couplers, hardware, and detailed instructions. Some systems include a black powder coated heat shield, to help isolate the air filter from engine heat and allow it to take in cooler air. The Retain system fits completely under the hood, so installation can be completed in usually 45 minutes or less. This system is backed by a 2-year limited warranty.

TAKEDA® is a division of Advanced Flow Engineering (aFe) Inc. Headquartered in Corona, California, the company was launched in 2009 to specialize in the development, design and manufacture of performance products for sport compact cars. Today, Takeda is most well-known for its line of performance air intake systems. These systems are flow bench and dyno tested for optimal performance, and feature mandrel-bent aluminum intake tubes in polished or black finish.

California Residents

WARNING Cancer and Reproductive Harm   www.p65warnings.ca.gov CARB To confirm your vehicle's CARB certification, please enter EO number at www.arb.ca.gov


Takeda warrants their products to be free from manufacturer's defects due to workmanship and material. This warranty applies only to the original purchaser of the product and is non-transferable. Proof of purchase of the aFe product is required for all warranty claims. Warranty is valid provided aFe instructions for installation and/or cleaning were properly followed. Proper maintenance with regular inspections of product is required to insure warranty coverage. Damage due to improper installation, abuse, unauthorized repair or alteration is not warranted. Incidental or consequential damages or cost, including installation and removal of part, incurred due to failure of aFe product is not covered under this warranty. All warranty is limited to the repair and/or replacement of the Takeda part.

  • Direct OE Replacement Filters: Life of the vehicle
  • Racing Filters : 1-year
  • Universal : 2 years
  • Air Intake Systems : 2 years
  • Exhaust Systems : 2 years
  • Intercoolers and Intercooler Tubes : 2 years
  • Intake Manifolds : 2 years
  • Exhaust Manifolds : 2 years
  • Throttle Body Spacers : 2 years
  • Fluid Filters : 90-days
  • Pre-Filters : 2 years

No other warranty expressed or implied applies nor is any person or advanced FLOW engineering authorized to assume any other warranty. Some States do not allow the exclusion or limitation of incidental or consequential damages or do not allow limitations on how long an implied warranty lasts, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More



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Takeda® - Retain Air Intake System
Takeda® - Retain Stage 2 Aluminum Polished Short Ram Air Intake System with Pro Dry S Gray Filter
Average Rating: 4.4 of 5
4 of 5
Almost Perfect.
I just installed this intake set, and I can definitely tell a difference in the exhaust note right off the bat. Not so much in 1st gear, but 2nd gear and up, greater than ~3k rpm you can really tell. Pretty decent sound enhancement, a little louder but still a lower toned growl. As far as performance enhancement, I can't really tell any marked difference. I guess it's the idea that makes your car a little faster? The installation was almost perfect. The supplied 5/8" hoses for the crank case were a little too long to fit very well, so I had to snip off maybe 1/4" from both to make it work. The mounting bracket for the driver side pipe was a little oversized, so I had to grind a little off in order to align the hole to where it mounted onto the engine. Other than that, everything else seemed pretty easy. I was kinda paranoid about the rubber sleeve being a bit too small or not sealing correctly, so after every other drive I'll open the hood and re-check to make sure it's still all attached. So far, after I think about 3 checks, it's still there. The heat shield seemed kinda useless, and it kinda impinged on the filter when I was trying to get it on. Honestly, K&N's typhoon dual intake system looks like its heat shields are actually way more useful. But in the end, you're still drawing the air from inside the engine compartment so I doubt heat shields would actually even make much difference. Overall, they look pretty nice, except I didnt have any logos on any of the components, the piping nor the heat shield, like as is represented in the product photo.
Posted by (Ham Lake, MN) / 2014 Infiniti Q60
Was this review helpful for you? Yes
4.8 of 5
So simple and effective.
Posted by (Miami, FL) / 2009 Infiniti G37
Was this review helpful for you? Yes
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