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Air and Fuel› Superchargers, Turbochargers and Components

GrimmSpeed

5-Ply Silicone Coupler Kit

$99.00 $94.00 Save $5.00

SKU: GRM090109

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

These 5-ply silicone couplers feature a smooth interior to maximize airflow and minimize restriction, with heat-resistant reinforcement to maintain their shape under high boost. The kit includes a 90-degree turbo outlet coupler, a throttle body coupler, and stainless steel high-torque clamps.
Show original supplier description
These 5-ply silicone couplers are engineered with a smooth interior to optimize airflow and reduce restriction, ensuring efficient performance. The heat-resistant reinforcement helps the couplers maintain their shape even under high boost conditions, preventing distortion and maintaining integrity. The kit includes a replacement 90-degree turbo outlet coupler with a trim-to-fit geometry, intentionally made long to accommodate older, smaller turbos. It also includes a throttle body coupler and rust-proof, smooth-operating stainless steel BREEZE high-torque clamps. The fiber-reinforced construction offers both flexibility and durability, isolating the TMIC assembly from engine vibrations. This coupler kit is designed for specific Subaru Impreza STI (2004-2020) and WRX (2002-2007) models, as well as the Subaru Forester XT (2004-2008). A critical fitment note specifies that these hoses are intended for vehicles equipped with either a factory STI intercooler or a GrimmSpeed Top Mount Intercooler only. Some trimming of the 90-degree coupler may be required for optimal fitment, especially with older or smaller turbo setups.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGrimmSpeed
Part NumberGRM090109
CategoryAir and Fuel
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5M+ Parts sold
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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