Does this come with the silencer?

As per Invidia it does come with the silencer.

Will this fit my 2018 civic si coupe?

Nope this is for the 9th gen sedan. Not a 10th gen coupe. Different engine, yours is turbo, and a different engine size/ wheel base.

Does this come with all mounting hardware?

Yes, everything needed to install this exhaust is included.

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(HS12HC4GTT) N1 Cat-Back Exhaust System with Titanium Tip for Honda Civic Si Sedan

Product ID: 6820104

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🌐Precision-engineered in Taiwan

📏70mm piping diameter for max flow

⚖️Lightweight 5 lbs for performance boost

Description

🔥 Elevate your Civic Si’s roar with Invidia’s titanium-tipped power boost!

CRAFTED IN TAIWAN - Precision manufacturing guarantees reliability and longevity
PREMIUM TITANIUM TIP - Sleek, durable finish that resists corrosion and turns heads
MAXIMIZED EXHAUST FLOW - 70mm piping diameter delivers aggressive sound and improved horsepower
TAILORED FOR HONDA CIVIC SI - Perfect fitment ensures hassle-free installation and OEM-level quality
LIGHTWEIGHT PERFORMANCE UPGRADE - At just 5 pounds, it reduces weight for enhanced driving dynamics

The Invidia HS12HC4GTT N1 Cat-Back Exhaust System features a 70mm diameter piping and a premium titanium tip, designed specifically for the Honda Civic Si Sedan. Weighing only 5 pounds and crafted in Taiwan, it offers a lightweight, durable upgrade that enhances exhaust flow, sound, and overall vehicle performance.

Specifications

Manufacturer	Invidia
Brand	Invidia
Model	HS12HC4GTT
Item Weight	5 pounds
Item model number	HS12HC4GTT
Manufacturer Part Number	HS12HC4GTT
OEM Part Number	HS12HC4GTT

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