SKU: 98605146855

GReddy DD-R Exhaust System for Civic Si Sedan 17+ (10158601)

Sale price$423.23 Regular price$470.25
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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

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Description

GReddy DD-R Exhaust System for Civic Si Sedan 17+ (10158601)With our distinctive style and design, the Greddy Performance Products DD R is our modern interpretation of the iconic GReddy DD "Dynamic Dual" exhaust of the past. Our distinctive DD exhausts with twin high flow, low restriction compact muffler section, have always been recognized for its aggressive dual exit look and racey sound. With this new high quality, race inspired DD R, we also incorporated updated and improved, full 304 stainless steel

With our distinctive style and design, the Greddy Performance Products DD-R is our modern interpretation of the iconic GReddy DD "Dynamic Dual" exhaust of the past. Our distinctive DD exhausts with twin high-flow, low restriction compact muffler section, have always been recognized for its aggressive dual exit look and racey sound. With this new high-quality, race-inspired DD-R, we also incorporated updated and improved, full 304 stainless-steel construction and new configurable features. The GPP DD-R has been adapted to modern tuner cars to not only enhances the looks and increase the growl of the engine, but to improve performance with its carefully designed dual high-flow straight-through muffler layouts. The new configurable features on the DD-R include the twin removable tips, with various options for tips finishers and silencers. This now allows the owner to easily fine-tune the looks, sound and flow of their DD-R.

The DD-R compact dual muffler exhaust for the Honda (FC3) Civic Si sedan is designed for owners who desire a high quality, free-flowing exhaust with aggressive looks and sound to match. This full stainless-steel cat-back system begins after the front over-pipe with a 76mm (3") front-pipe with tucked resonator to a full 3" mid-pipe all the way back to the rear section. The 3" piping then splits to two large 63.5mm (2.5") inlets for the polished, 101.5mm (4") DD-R mufflers via our precision Y-pipe. The DD-R is finished off with removable dual GPP engraved stainless steel slash-cut tips. The DD-R's removable tips allow for customization with various optional tips and muffler silencers (sold separately.)

Features:

  • Full Stainless Steel Construction
  • Expertly Crafter Welds
  • Removeable Tips
  • Impressive Exhaust Tone
  • Various Options for Tips and Silencers
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: 98605146855

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4.1 ★★★★★
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TC
Natrona Heights, US
★★★★★ 5
This are the best in men’s underwear. Modal fabric is the key.
Color: Black, Size: Small, Color: Black, Size: Small
Well I tried Hanes bikinis small and medium said to be the best seller. Maybe for a young boy but not for me an older man. Tried numerous others and none fit like these. The most comfortable of all I tried probably because the waistband being between mid and low and not so wide a fabric and fit the best. The biggest thing I love about these is the pouch area being just right and the fabric is so soft. Modal is the way to go. Cotton bunches up. Great quality and price. Can’t go wrong with these. Tried boxer briefs and trunks also and all to high waisted even when advertised as low, and the pouch area were bulkier. Edited: The solid colors are ok for casual use only but not for sports. The ones with a fancy design are better. Bigger pouch area and a different style waist band.
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Reviewed in the United States on May 18, 2026
D
Verified Purchase
DadK
Los Angeles, US
★★★★★ 5
Soft, true-fit briefs — great daily comfort, not ideal for workouts
Color: Black, Size: Large
I’ve been wearing these wirarpa modal briefs every day for about a month, and they’ve quickly become my go-to pair for daily wear. I previously owned the same brand’s boxer briefs for over a year, which held up better than any other brand I’ve tried, so I decided to test the brief version this time. Fit and Comfort The sizing was spot-on for me. The waistband is soft, not scratchy, and doesn’t dig in — it stays in place without rolling. The leg openings don’t ride up, and everything stays comfortably supported without tight seams in the wrong spots. I’d almost forgotten how briefs feel after years of wearing boxer briefs, but these reminded me why they’re still worth owning. Fabric and Wearability The modal material is silky and smooth to the touch. It’s perfect for everyday comfort and casual wear, but not the best choice for sports — it’s not highly moisture-wicking, so I wouldn’t use them for workouts or hot outdoor work. Durability After a month of daily washing, there’s no pilling, stretching, or loose stitching at all. If they hold up like my year-old wirarpa boxer briefs, I expect these to last far longer than most big-name brands. Design Notes These come neatly rolled in a sealed bag with no odor or chemical smell — a nice touch that shows some quality control. Bottom Line If you like a soft, lightweight brief that fits true to size and stays comfortable all day, these are a great value. Go for the boxer briefs if you want more coverage or plan to sweat in them, but for regular daily wear, these hit the mark perfectly.
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Reviewed in the United States on November 5, 2025
J
Verified Purchase
JustAShopper
Lexington, US
★★★★★ 5
Soft, lightweight, and comfortable
Color: Black,navy,burgundy,brown, Size: Medium
These briefs are soft, lightweight, and very comfortable for everyday wear. The modal microfiber material has a nice silky feel, and they provide plenty of room without feeling bulky. The fit is true to size, which is always a plus when ordering underwear online. Overall, a comfortable and well-made option if you want something soft and easy to wear all day.
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Reviewed in the United States on March 24, 2026
A
Verified Purchase
Amazon Customer
Pawtucket, US
★★★★★ 4
Comfortable and soft
Color: Black, Size: Small
I purchased these in small. I have a 30-inch waist, and the small is loose on me. They are described as handmade, and to expect some variance, but there is a noticeable difference between individual items. Individually, they are well constructed, just inconsistent in size.
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Reviewed in the United States on April 30, 2026
D
Verified Purchase
Drew Amador
Boise, US
★★★★★ 5
Just buy them
Color: Black,navy,burgundy,brown, Size: Small
Used to wear sliders all the time, figured i'd switch it up. These are super comfortable, probably the best material underwear I own. Great to just lounge around it or wear everyday. Fit is really good, I got a small and about 29-30" waist. Good bang for your buck too. I've washed them a handful of times and they hold up great, fit great and dont' shrink.
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Reviewed in the United States on May 7, 2026

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