Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
XForce | 1 3/4" Header & High Flow Metallic Cat Kit | Jeep Grand Cherokee SRT8 6.4L | HS-JC12-KITXForce Header and High Flow Metallic Cat Kit Jeep Grand Cherokee SRT8 6. 4L (2011 2021) HS JC12 KIT Enhance the performance of your Jeep Grand Cherokee SRT8 with the XForce Header and High Flow Metallic Catalytic Converter Kit. Proudly Engineered for Power and featuring a Tuned 4 1 Design, these premium components deliver maximum exhaust flow to optimize horsepower and torque gains. Please note: This kit will only bolt up to an XForce cat back system
XForce Header and High Flow Metallic Cat Kit - Jeep Grand Cherokee SRT8 6.4L (2011 - 2021) - HS-JC12-KIT
Enhance the performance of your Jeep Grand Cherokee SRT8 with the XForce Header and High-Flow Metallic Catalytic Converter Kit. Proudly Engineered for Power and featuring a Tuned 4-1 Design, these premium components deliver maximum exhaust flow to optimize horsepower and torque gains. Please note: This kit will only bolt up to an XForce cat-back system and requires a vehicle tune after installation.
What's in the Box?
- XForce 1 3/4" 4-1 Tuned Headers
- Twin 3" 100 Cell High Flow Metallic Catalytic Converters
- Installation Gasket Kit
- Bolts and Hardware
Note: Professional installation and ECU remapping are mandatory to ensure peak performance and sensor compatibility.
Features:
Built for the demands of high-performance driving, this product offers the following features:
- 304 Stainless Steel Construction: High-grade material for superior durability and corrosion resistance.
- 4-1 Tuned Design: 1 3/4" primary pipes with a 3" outlet collector for smooth, high-velocity airflow.
- 100 Cell Metallic Cats: High-flow converters that reduce restriction while maintaining exhaust efficiency.
- Mandrel-Bent Tubing: Ensures consistent pipe diameter throughout bends to eliminate flow bottlenecks.
Specifications:
- Make: Jeep
- Model: Grand Cherokee SRT8
- Year Range: 2011 - 2021
- Engine: 6.4L HEMI V8 (ESG)
- Material: 304 Stainless Steel
- Primary Size: 44mm (1 3/4")
- Collector Size: 76mm (3")
Important Information
- The image shown may not reflect the actual product
- Shipping times may vary depending on destination and stock availability
Vehicle Applications:
Vehicle Applications for XForce HS-JC12-KIT
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| JEEP | ||||||||
| JEEP | GRAND CHEROKEE | 03/2011 | 07/2021 | SUV | WK, WK2 | ESG | 6.4L | SRT8 | AWD |
| JEEP | GRAND CHEROKEE | 10/2012 | 01/2019 | Wagon | WK | ESG | 6.4L | SRT8 | AWD |
Warranty Information
| Product Type | Warranty Period |
|---|---|
| 304 & 201 Stainless Steel Exhaust Systems | 60 Months |
| Accessories | 12 Months |
| Catalytic Converters | 12 Months |
| Electronic Products (Including SmartBox) | 12 Months |
| Mild Steel & 409 Stainless Steel Exhaust Systems | 24 Months |
| Mild Steel Headers | 12 Months |
| Stainless Steel Headers | 24 Months |
| Universal 304 Stainless Steel Mufflers | 24 Months |
| Universal Mild Steel & 409 Stainless Steel Mufflers | 12 Months |
Payment & Security:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
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
4.2 ★★★★★
Based on 355 reviews
Sort
Product Reviews
★★★★★ 5
Great Place to Start
Format: Paperback
Clear and entertaining
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
★★★★★ 5
Engaging Read for Beginners and Techies Alike
Format: Paperback
An engaging and accessible exploration of how computers really work. The author breaks down complex concepts into simple, relatable explanations, making topics like binary, logic gates, and basic circuits far less intimidating. For newcomers, it’s a great way to build a foundational understanding of computer theory with just a touch of electrical engineering.
As someone with a technical background, I still found it entertaining; the examples and analogies added fresh ways to frame ideas I already knew. It’s the kind of book that can bridge the gap between “I use computers” and “I understand what’s happening under the hood.”
Highly recommended for anyone curious about what makes hardware and software tick, whether you’re starting from scratch or just want a new perspective.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
★★★★★ 5
CODE is the book you should get.
Format: Paperback
The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up.
Recommend to everyone wanting to become a programmer, or just interested in computers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
★★★★★ 5
If you only buy one technical computer book, this is it
Format: Paperback
Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block.
This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles.
I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading.
The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great.
If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 31, 2023
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition.
For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc.
What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves.
Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2023