SKU: 65370172437

IAG Stage 4 Extreme EJ25 Closed Deck Case - 14mm H.S.M. Fire-Lock, Pinned + Line Honed, ARP Case Bolts, 99.75mm Bore & Hone - for Subaru WRX, STI.

Sale price$1934.99 Regular price$2149.99
Save 10%

Pay in installments of $537.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Oct 13 - Oct 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

IAG Stage 4 Extreme EJ25 Closed Deck Case - 14mm H.S.M. Fire-Lock, Pinned + Line Honed, ARP Case Bolts, 99.75mm Bore & Hone - for Subaru WRX, STI.The Stage 4 Extreme is IAG's strongest and most prepared EJ25 Closed Deck offering. The case halves are split and the main webs are CNC machined in our Haas VF 4SS CNC mill for 9. 5mm pins to reduce distortion and movement of the case in extreme conditions. The case halves are then reassembled and IAG machines the case to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow

IAG Stage 4 Extreme EJ25 Closed Deck Case - 14mm H.S.M. Fire-Lock, Pinned + Line Honed, ARP Case Bolts, 99.75mm Bore & Hone - for Subaru WRX, STI.
IAG Stage 4 Extreme EJ25 Closed Deck Case - 14mm H.S.M. Fire-Lock, Pinned + Line Honed, ARP Case Bolts, 99.75mm Bore & Hone - for Subaru WRX, STI.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 65370172437

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 1298 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
momof5
Draper, US
★★★★★ 5
Highly recommend
Color: 4" Combo Light, Color: 4" Combo Light
Super bright and heavy duty lights. Would highly recommend! The installation was easy and straightforward.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
H
Verified Purchase
huber Vargas
Belleville, US
★★★★★ 5
Great Value and quality
Color: 4" Combo Light, Color: 4" Combo Light
These lights are awesome! Installed them on my 2019 Ford f250 They are freaking bright, super sturdy, look great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
E
Verified Purchase
Excelente
Houston, US
★★★★★ 5
Great product
Color: 4.5" Spot Light
Excellent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
C
Verified Purchase
CnC
Boise, US
★★★★★ 5
High quality
Color: White Combo Beam
Excellent quality. By far the easiest wiring installation you deal with for lights. I would definitely buy them again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 25, 2026
J
Verified Purchase
jeff moeser
Los Angeles, US
★★★★★ 5
Covers all your lighting needs
Color: White Combo Beam, Color: White Combo Beam
This set of lights was the perfect size for my Polaris RZR. Factory headlights were useless, even after changing 1200 lumen bulbs to 6000 lumen bulbs. This set of Aux beam lights are heavy well built, housings are powder coated and very solid, all hardware s stainless steel. The high low beam option works great when dealing with on coming traffic. They see you switch to dim and you don't get high beams flashed at u. Plus the high/low are seperate switches so u can run both at the same time. They are very bright and have excellent penatration. 👌 only thing wrong, directions included were for installing a light bar (bar only) nothing about lighting or wiring. As I am a Polaris mechanic this wasn't an issue, in fact didn't look at the instructions till I was done to even notice it was the wrong instructions in the kit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2024

recommand products