VR Forged Cat 2021
  See more parts for your Porsche 981 Boxster

Agency Power Throttle Body Upgrade Kit Porsche 981 Boxster Cayman 3.4L

$900.00 Sale:$800.00

Agency Power

Model #AP-981-102

Free Shipping

In Stock

Help me decide

Shopper Award

Improving the performance on the 3.4L engine for the Porsche 981 Boxster | Cayman just got easier with the Agency Power upgraded throttle body kit.  The direct fuel injected engine sits just in front of the rear wheels giving the 981 amazing balance and handling.  However, this engine design provides challenges to doing bolt on modifications.  To improve vehicle performance, Agency Power has designed a kit that utilizes the OEM Porsche 997 GT3 82mm throttle body. 

The larger diameter throttle body allows for more air to go into sucked into the engine.  As the old school formula goes, the more air, the more power.  Air going into the throttle body from the intake side is more important than what is behind the throttle body.  Because the Porsche engine works off of pulses, there is no reason on this 3.4L engine to change the plenum.  The factory plenum has enough flow and the only reason to change it out would be installation convenience for other products.  The GT3 Porsche throttle body has a larger bolt pattern which will not bolt up to the stock plenum.  So Agency Power has engineered a CNC machined adapter which allows the use of the stock plenum to the larger throttle body.  The adapter has been precision machined out of 6061 aluminum and features an anodized finish with the Agency Power logo.  Its unique keyed fitment allows for easy installation on the vehicle.  With tight engine space and larger diameter parts, the factory rubber intake hose nor a hard aluminum pipe will work.  To offer the best air flow and easiest installation, Agency Power has designed this silicone intake piece.  The 3 ply silicone hose clamps securely to the throttle body and intake pipes.  

The upgrade kit is a direct plug and play and includes the necessary adapters, clamps, silicone hoses and throttle body to fit to your car.  As tested on a Porsche 981 Cayman S, the throttle body kit added a peak gain of 20HP at 6435 rpm where it averaged about a 10-15hp gain from 5000 rpm to redline.  Torque maintained an average of 10 ft/lbs from 5000 rpm to redline.  Tuning is not required, though as tested with a VR Tuned ECU Flash, performance is maximized throughout the entire RPM range.

Agency Power Throttle Body Kit Includes -

  • OEM Porsche 997 GT3 82mm Throttle Body
  • CNC Machined Adapter Plate
  • Red Silicone Connecting Hose
  • Clamps and Hardware for Installation
  • View Installation Instructions Here


  • 2012-2016 Porsche 981 Boxster or Cayman S | GTS 3.4L

Other Part Numbers:
Agency Power #393429088443

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm


Vehicle Engine Notes
Porsche 981 Boxster

Porsche 981 Cayman

Who is Agency Power?

Agency Power Industries LLC was born from a need to bring quality, functional, and stylish racing products to market. The brand started out with sway bar end links for the Subaru WRX back in 2003, and has since grown to include over 300 part numbers for cars ranging from the Subaru STI, Mitsubishi EVO, BMW M3, Porsche 996, Scion TC, and more! In 2016, Agency Power further expanded its lineup to include UTV products and launched a comprehensive series of off-road parts two years later in 2018.

Based out of Gilbert, Arizona, Agency Power has established itself as a premier aftermarket company for niche tuner parts. The AP brand is constantly coming up with new functional and race-proven products for its customer base. Agency Power is globally recognized and trusted with dealers all around the world. Apart from the USA, AP can be found in Canada, Singapore, South Africa, Australia, Russia, the United Kingdom, and other parts of the European Union. 

What Does Agency Power Offer?

Agency Power offers an extensive lineup of high-quality products like multi-adjustable control arms, Valvetronic exhaust systems, and roto-molded intake kits. Agency Power takes pride in having an edge over the competition with top-rated products that truly make a difference in your performance vehicle. Some of AP’s most innovative products include STI fuel rails, RX8 pulley kits, EVO rear control arms, and 996TT boost hoses. What’s more, Agency Power’s full titanium mufflers catback exhausts, GT35R turbo kits, and adjustable sway bars help keep the brand at the forefront of the automotive aftermarket competition.

AP conducts extensive in-depth product testing, racing, and quality checks before releasing any items to market. That’s because the brand has a solid reputation to maintain. In fact, Agency Power parts have been spotlighted in several videos, competition events, and magazines like Super Street, Bimmer, Import Tuner, DSport, and Modified.

Why Choose Agency Power?

Agency Power takes great pride in providing top-level customer service and dealer support. AP’s highly knowledgeable team is always available to answer any questions and is there throughout the entire purchase process from before to after. Apart from having solid know-how, the team also owns some of the cars that the company makes products for. This helps the staff understand more of what customers could want or need for their own vehicles. Agency Power stands by all its products 100 percent of the way and offers a limited lifetime warranty.

All Agency Power parts have been proven on the dyno, in competition, and against the real test of time. AP products are all developed and manufactured by car enthusiasts for car enthusiasts. Before any product comes to market, Agency Power carries out in-depth research to see if a similar item is available or what the market may want. The brand then conducts a comparison to see where and how AP can fit in. The mission of Agency Power is to create products that the company and its customers are proud of, and ones that can be integrated seamlessly and used successfully.

Find Agency Power at Vivid Racing

Vivid Racing carries a wide array of Agency Power products for various makes, models, and applications. Our AP inventory includes everything from aerodynamic body parts to performance-enhancing products and suspension components. We carry AP air filters, blow-off valves, catback exhausts, body kits, turbos, springs, sway bars, brake kits, and much, much more! If, by some chance, you cannot find exactly what you are looking for above, please contact Vivid Racing’s specialized sales team at (480) 966-3040.

All Agency Power products come with a LIMITED 1 YR WARRANTY to the original purchaser.  To receive the Agency Power product warranty, you must have an original copy of your invoice or receipt, fill out our warranty form located HERE, and follow our instructions for replacement or repair.  

Warranty claims will not be fulfilled for incorrect installation, abuse, damage from accidents, and does not pertain to wearable items.  We have the right to refuse warranty based on any of these conditions.  This warranty is at our discretion only.  All products are intended for race use only and should be installed, and properly calibrated by professional service centers only. 

We are not responsible for shipping costs to us, if the product is deemed to be a manufacturer defect we will repair or replace the product at our discretion, and return the product to the original sender.  

Agency Power does not cover costs of labor, shipping, or other fees related to warranty or product installations.

Check out these other great products