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Exhaust› Exhaust Pipes, Systems and Components

Thermal

3-Inch 304 Stainless Steel Cat-Back Exhaust

$715.78 $674.10 Save $41.68

SKU: B153-C152

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Thermal R&D cat-back exhaust is designed for the 2006-2011 Honda Civic Si.

This system features 3-inch diameter tubing and a 4-inch diameter tip, constructed from 304-grade stainless steel.
Show original supplier description
The Thermal R&D cat-back exhaust system is precision-engineered for the 2006-2011 Honda Civic Si, offering a significant upgrade in performance and sound. The straight-through muffler design is optimized for maximum performance, providing an aggressive exhaust note expected from a performance exhaust system. Thermal R&D prioritizes sound quality and manufacturing excellence, ensuring a superior fit and finish for both street and track applications. This exhaust is specifically designed for the 4-door sedan models (part number B153-C152). It is noted that this exhaust will only connect to race headers, and an adapter may be required for OEM headers.

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

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandThermal
Part NumberB153-C152
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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