- DroneTrap Technology -IE's proprietary no-drone resonator design
- Bolt-on direct fit -No cutting, no welding, no hassle
- Aggressive look -Large 90mm slash-cut quad tips
- High-flow design -Dual 2.5" piping to support any power output
- Reliable engineering -Leak free, stamped, & multi-point reinforced
- 50 states legal -No check engine light & emissions compliant
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Description
Integrated Engineering Catback Exhaust System For Audi B9/B9.5 S4LEADING FEATURES DroneTrap Technology IE's proprietary no drone resonator design Bolt on direct fit No cutting, no welding, no hassle Aggressive look Large 90mm slash cut quad tips High flow design Dual 2. 5" piping to support any power output Reliable engineering Leak free, stamped, & multi point reinforced 50 states legal No check engine light & emissions compliant DESIGN DETAILS STRONG, REINFORCED, RELIABLE IE's advanced DroneTrap technology
LEADING FEATURES
DESIGN DETAILS
STRONG, REINFORCED, RELIABLE
IE's advanced DroneTrap technology captures the pulse waves responsible for your B9 3.0T engine's exhaust note and draws them into dual mathematically tuned resonators. The internal ports are engineered to resonate these waves against each other in a process that selectively cancels out those responsible for annoying drones. The remaining waves produce the deepened and enriched exhaust acoustics you love.
QUAD SLASH-CUT TIPS
What is the point of a larger exhaust that looks stock? Stand out from the crowd with oversized 90mm quad slash-cut exhaust tips. These aggressive-looking tips fill the factory exhaust cutouts for that high-end sporty look.
COMPLETE BOLT-IN KIT
Our catback design includes all sections to replace the factory exhaust tips, mufflers, and resonator up to the midpipes. Enjoy an unrestricted system that delivers the perfect exhaust note from your turbocharged V6 engine.
OPTIONAL MIDPIPES
Want to take your catback to the next level? Add a set of IE Midpipes for an even larger boost in sound. By upgrading this section, you'll remove the two factory resonators and 12 feet of exhaust piping, further improving exhaust flow and acoustic notes.
Midpipe upgrade is optional, and the catback can be installed with either stock or IE midpipes.
ADVANCED ENGINEERING
Advanced 3D scanning tools and cutting-edge software provide our engineers with a high-resolution digital model of the Audi B9 S4 chassis. This data is then used to maximize the exhaust size for flow and optimize all available space for the perfect catback fitment.
TIG WELDED T304L STAINLESS STEEL
All piping is constructed of mandrel-bent T304L stainless steel to offer superior corrosion resistance. All joints are hand TIG welded using precise fixtures and tooling. We take great pride in knowing your new exhaust will sound remarkable and stand the test of time.
STAMPED RESONATOR
The DroneTrap system is wrapped up in our stamped multi-wall resonator that reinforces the housing inside and out. This high level of manufacturing protects the resonator from warping or splitting at the welds under exhaust movement.
REINFORCED HANGERS
Engine movement and exhaust weight are transferred into the exhaust hangers, which puts a lot of stress on the mount brackets. IE's catback system is manufactured with multi-point and boxed-in hanger mounts designed to stand the test of time. Drive confidently knowing your exhaust is securely mounted and protected against annoying rattles or breaks.
BRIDGED PIPING
Sections comprised of dual 2.5" piping running in parallel are reinforced and bridged to offer superior strength and weight dispersion. This minor detail works hard to reduce stress on the welds and protect the piping from vibrations and twisting that can lead to leaks and rattles.
LEAK-FREE CLAMPS
Enjoy a tuned and enjoyable exhaust note without any raspy leaks ruining the show. Our exhaust system assembles with our wide-width stretch clamps designed to seal and pull your exhaust connections together. This style of clamp design is popular in high-end OE applications and is known for long-term reliability.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.0 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
"In a moment of clarity, I realized I knew why a good guy would never be enough..."
Format: Kindle
"...Good guys didn't touch you like the bad guys did. They didn't push the limits. Hold you down. Make you insane with need. Make you scream."
A spin off from the Crows but it's own story. I've been rushing to get to this book (had some others I had to read first). But I could not hold off any longer. I happily picked it up and refused to put it down. This book is going to pick up where we left off with Becca from the Boys of Briar Hall. She has made her way to SoCal Arts and cut off by her dad.
The Kings of Kilburn, also cousins to our Crows, have been asked to watch Becca as a favor. Ava Jade is worried about her. Hardin and Kaleb have their own issues but someone find themselves individually drawn to Becca. And Becca, well her bad guy rep is pulling her to them just as much. What should be toxic, is super HOT.
But the Kings have Saint business as well. Damian St Vincent, the ruthless leader of this Saints chapter, also happens to be the boys father. And they are currently being threatened by a new Irish gang, Sons of Sullivan. This threat is unaliving member of the Saints and messing up relationships that have been established. Damian warns the guys to stay away from Becca because with this threat, it could put her in danger if she is a known associate to the boys. But things are never that easy.
And lastly, we have would could be a third player. Aódhan. He's Irish and has his own secrets. Also super hot and seems to find himself infatuated with Becca too. But the last chapter, we are going to see inside his POV, and there is more to this Irishmen to come for sure.
Cliffhanger! I always want more from Elena Lawson books, but I love them so much I can't wait for the series to be completed before diving in.
**READ YOUR TRIGGER WARNINGS**
Happy Reading Ya'll!
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Reviewed in the United States on April 6, 2023
★★★★★ 3
hoping for a little more
Format: Kindle
I was hoping for a little more with this book as I loved the other series in this “world,” and hoping it’ll come in the 2nd book. During this book I kept skipping pages ahead trying to move things along, just didn’t really feel like much was answered or accomplished but I’m sure that was the authors point in trying to build everything up but for me it just dragged a bit…Will absolutely read book 2 to see how it all unfolds.
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Reviewed in the United States on July 2, 2024
★★★★★ 5
Can’t Wait For The Next Book!!!
Format: Kindle
⭐️⭐️⭐️⭐️⭐️
Review
This is the first book in the new series Kings Of Kilborn University by Elena Lawson and an absolutely fantastic start to the series. This follows after Boys Of Briar Hall Series and we even get to see AJ and the Crows.
This is Becca’s story after she left Thorn Valley and it’s one intense ride to say the least. Trying to avoid the gang violence she previously suffered she gets a fresh start and a chance at independence something she’s been desperate for. When she meets brothers Kaleb and Hardin things get absolutely intense. They are the Kings of Kilborn and also her new tormentors and they become absolutely obsessed with her. This is a story you have absolutely got to read. The chemistry between the three is off the charts even though Becca just wants to keep away from them she can’t deny the connection.
This book will seriously have you on edge, it’s got violence, gang war between the Saints and the O’Sullivan Sons, lots of twists and turns, and unexpected revelations at the end that will leave you needing book two asap. Am seriously looking forward to finding out what happens next for these characters. Definitely an awesome start to new series. Highly recommend this.
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Reviewed in the United States on February 6, 2023
★★★★★ 4
4.5 ⭐ I loved it!
Format: Kindle
Excellent story line.
I have loved all in this book whisch was very smart.
My favorite gentleman here is Aodhan since the begining I fell for him.
The sex chemistry here was amazing!
The only thing I did not like was: they talk about class in the university but we never had a scene in that scenario the rest very good.
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Reviewed in the United States on October 1, 2025
★★★★★ 5
Fun, Smutty, and Just A Little Bloody
Format: Kindle
Thoughts: 💡
This book was exactly what I expected it to be, and I rather liked that. It was twisted and the characters are tormented, more towards the dark end of morally gray. The story eased into the spice, but I would still say that half of the story was smut and some of it was kinky. 😈
I read the series Boys of Briar Hall, so there were some secrets that I already knew and others that I could guess. My enjoyment came from reading about how the characters dealt with their secrets.
Coming into the series I knew that Becca would have an attitude and flaws and I really liked that Lawson stayed true to them. Becca’s development felt like it was earned. This wasn’t a dark novel where a billionaire sweeps in and all the FMCs worldly woes float away. She honestly had to learn to work and balance real issues and build some inner strength.
I don’t know yet if these characters will have the same sort of immortality that was prevalent in Boys of Briar Hall, so far they don’t and I’m hoping it stays that way.
Overall I can’t complain about the mechanics or grammar in the book. There were a few awkwardly stated phrases but I think it’s because they’re colloquially phrases so I let those slide.
We do get three other POVs in the story and I think that both Kaleb and Hardin were well developed. The final POV was a bit of a surprise and I still don’t know what Lawson intends for the character so I’m excited to see what happens in her next book.
Fun Bits:
⚜️ Riches to Rags
⚜️ Dark Secretes
⚜️ Kinky Smut
⚜️ Great Character Development
Spice Scale: 4 🌶️ 🌶️🌶️🌶️/5
Character Dev: 5 💙💙💙💙💙/5
Contemporary Romance: Gang, Enemies to lovers, Dark, RH 📘
POV: Multi 👩❤️👨
CW: Violence, Abuse, DubCon ⚠️
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Reviewed in the United States on May 20, 2023