Set Your 2008 Subaru WRX STI Catalog
A down arrow

GrimmSpeed Chase Overtake Turbo Upgrade Kits for 2008 Subaru WRX STI

Subaru WRX STI - 2004 to 2014 - All [All] (Overtake BB500)
More / Larger Pics (1)
Fits:
Subaru WRX STI - 2004 to 2014 - All Door Configs [All Trim Levels]
More Info:
Direct bolt-on installation. No modifications required.
List Price:
$1699.00
Our Price:
$1699.00
You Save:
$0.00
 
 
1-4 DAY FAST FREE SHIPPING!
(free to mainland U.S. only)
Select an Application For Your
2008 Subaru WRX STI
 
Door Config  [Trim Level]
Application / Notes
All [All]
(Chase JB400)
All [All]
(Overtake BB500)
 
🔰 Subaru WRX STI Fitment Help
Quicker Navigation & Better Info
Set Your Car Once & Site Customizes For It

CARB Compliance / Exemption Warning: If you live in California and your application for this product is not CARB Compliant / Exempt, then you cannot purchase it for public highway or street use (in that case it could only be used for formally sanctioned race use on a racing vehicle that may never be used on a public highway or street). If your application is not CARB Compliant / Exempt and you're shipping to California, our system will let you know on the final checkout page.

This manufacturer has a policy which prevents shipment to California for applications of this product that are not CARB Compliant / Exempt. Therefore, if you live in California, you will not be able to receive your part if it does not have a CARB EO #, even if it is for a dedicated race vehicle.

These turbos are designed to fit directly on the stock turbo flange. A tune and fuel upgrades are required to properly utilize the increased power levels these turbos offer.

As you slowly build your engine for more power, you find that the stock turbo begins to struggle to keep up. The stock turbo can only handle so much pressure and airflow before it can no longer deliver what is necessary. GrimmSpeed spent 3 years developing these "Chase" JB400 and "Overtake" BB500 turbo upgrades to solve this problem, and the results are amazing.

  • The Chase JB400 is the smaller option, but delivers incredible punch. Let's just say it's not your average journal bearing turbo. The compressor wheel size (Inducer / Exducer) is: 51.2mm / 73.8mm Extended tip, 48 Trim, and the turbine wheel size (Inducer / Exducer) is: 53.8mm / 47mm, 76 Trim. Compressor A/R is 0.65 and Turbine A/R is 0.88. The compressor wheel is made of billet 2618 aluminum, and the compressor housing is made of A356 aluminum. The Chase JB400 turbo also uses severe-duty 360 degree thrust and twin hydrodynamic bearings for extreme reliability for it's size. It's got quick response and excellent spool too. The wastegate is also adjustable and preset to 15 PSI.
  • The Overtake BB500 is the larger one of the two turbos and brings it's best to the table. In short, it's a world-class ball bearing turbo that still has great response and spool characteristics. The compressor wheel size (Inducer / Exducer) is: 55.1mm / 74.6mm, 54 Trim, and the turbine wheel size (Inducer / Exducer) is: 60mm / 55.1mm, 84 Trim. Compressor A/R is 0.65 and Turbine A/R is 0.88. Made from the same materials as the JB400 but much larger in size. This option also uses upgraded ceramic ball bearing featuring silver plated 4340 steel bearing cages for exceptional strength and durability at very high speeds and heat. The wastegate is also adjustable and preset to 15 PSI.
Key Features:
  • Capable of 440+ whp on the Chase JB400 Turbo and 488+ whp on the Overtake BB500 Turbo while still maintaining great throttle response and mid-range power / torque. These results can be achieved with just basic bolt-ons, fuel mods, and a tune. More hardcore upgrades like cams and an intake manifold will yield even more power.
  • Made from top-tier materials for extreme durability and performance.
  • Fits on the stock turbo flange.
  • Incredible flow and operation.
  • Adjustable wastegate.
  • 3 years of development time to achieve perfection!

  Don't have a 2008 Subaru WRX STI?

Application Price List & Information Overview
Application List Price Our Price
Subaru WRX STI - 2004 to 2014 - All [All] GrimmSpeed Chase Overtake Turbo Upgrade Kits

Notes: (Chase JB400)

More Info: Direct bolt-on installation. No modifications required.
$1350.00$1350.00
Subaru WRX STI - 2004 to 2014 - All [All] GrimmSpeed Chase Overtake Turbo Upgrade Kits

Notes: (Overtake BB500)

More Info: Direct bolt-on installation. No modifications required.
$1699.00$1699.00
Featured Supported Door Configuration:
Subaru WRX STI Sedan , Subaru WRX STI Hatchback

GrimmSpeed Chase Overtake Turbo Upgrade Kits supported 2008 Subaru WRX STI Trim Levels:
Base , Limited


Our Customers Love Us - See our Reviews

Excellent

star rating
star rating
star rating
star rating
star rating
Verified Reviews

See a few of our reviews below:
star rated
star rated
star rated
star rated
star rated
Amazing customer service. I had some issues with parts not being available in the US and they were able to source it as well as let me know. Communication was amazing. Cristian in customer service answered all of my questions quickly and reached out to me when an issue came up. Very friendly and professional. If you order multiple items they may come separately and may require a signature for delivery.
Merchant Reply ArrowReply from company
Kyle, Thank you so much for your positive feedback! We're thrilled to hear that Cristian provided such excellent customer service and communication while helping you with your parts. We strive to ensure that our customers have the best experience possible, especially when it comes to sourcing parts for your vehicle. We do try our best to manage multiple item orders, which sometimes means they'll arrive separately, and we appreciate your understanding regarding the signature requirement for delivery. If you have any questions or need assistance with future orders, please don't hesitate to reach out! Best Regards, Customer Care
star rated
star rated
star rated
star rated
star rated
Great service, they communicated any problems with the delivery no matter how small and was only a day off schedule which is no big deal, glad to have a customer service that cares about lot, highly recommend
Merchant Reply ArrowReply from company
Cohlton, Thank you for your kind words! We're thrilled to hear that you had a positive experience with our customer service and that we could keep you informed about your delivery. We strive to provide the best service possible and appreciate your recommendation. If you have any other questions or need assistance with future orders, feel free to reach out to us anytime. Best Regards, Customer Care
star rated
star rated
star rated
star rated
star rated
Great product, great price and fast shipment. Staff contacted me right away about parts not available and found substitute part immediately.
Merchant Reply ArrowReply from company
Ty, Thank you for your wonderful feedback! We're thrilled to hear that you had a great experience with our staff in handling your order and providing a substitute part. We strive to offer high-quality products at competitive prices and ensure prompt shipping whenever possible. If you have any questions about your future orders, please dont hesitate to reach out to us. We look forward to helping you upgrade your vehicle again! Best Regards, Customer Care
star rated
star rated
star rated
star rated
star rated
Response to any question or concern is fast and professional. I highly recommend, also would recommend to family specifically my Mom lol, thats how much i like these guys!
Merchant Reply ArrowReply from company
Sandy, Thank you for your kind words! We're thrilled to hear you had a positive experience with us and that you would recommend our services to your family, including your Mom! We strive to provide the best possible place to upgrade your vehicle, and your feedback means a lot to us. If you have any questions or need assistance in the future, please don't hesitate to reach out. Best Regards, Customer Care
star rated
star rated
star rated
star rated
star rated
Great quality and showed up early, and was easy to install
Merchant Reply ArrowReply from company
Joey, Thank you for your positive feedback! We're thrilled to hear that you found our product's quality great, that it arrived early, and that the installation was a breeze. We always aim to provide the best experience possible for upgrades to your vehicle. If you have any questions or need assistance for future orders, feel free to reach out! Best Regards, Customer Care