HKS Equal Length Header / Exhaust Manifold | 2008-2021 Subaru STI

Stainless Steel Exhaust Manifold by HKS

The HKS Equal Length Header (Exhaust Manifold) for the Subaru EJ25 motor works on the 08-14 Impreza WRX/STI and the new 15+ STI. It replaces the OEM header for better flow and performance using a 4-1 setup to improve low range and high range performance (mid range is at oem level) with all things the same. Increase exhaust flow with improved spool, providing a win win situation.

This is a great product for those looking to push power from their OEM turbo setup or those using OEM style 2-bolt flanged pipes. This is also a great addition to lower EGT.

Features

• 4-1 Exhaust Manifold (almost 4-2-1 setup)
• Quad 42.7mm to dual to single 52mm piping
• Increasing Low/High range power (mid range same as OEM)
• Can be used with the oem Oil Pan
• Made of SUH409 Steel
• Made in Japan

Please Note: Going from unequal to equal length will change exhaust note from rumble to a higher pitch. Will not fit WRX models.