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SKU: 3521H640 | UPC: 842422180751
Kooks 2" x 3" Long Tube Headers & H.O. GREEN Catted Connection Pipes for 2021–2025 Ram 1500 TRX 6.2L Supercharged HEMI
The Kooks 2-inch x 3-inch long tube headers and H.O. GREEN catted connection pipes kit unleashes the full fury of the 2021–2025 Ram 1500 TRX with the supercharged 6.2L HEMI V8, replacing factory manifolds to deliver dyno-proven gains of 80–100 rear-wheel horsepower and 90–120 lb-ft of torque through equal-length primaries, merged collectors, and high-flow 3-inch H.O. GREEN catted pipes that bolt directly to the OEM mid-pipe for seamless integration and unrestricted flow under boost pressures exceeding 15 PSI.
Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges, full TIG welds, and 400-cell metallic substrate H.O. GREEN catalytic converters, this system supports over 1,200 HP while remaining 49-state emissions compliant and preserving the TRX’s ferocious supercharged soundtrack without drone. The precision design maintains factory ground clearance and heat shielding for off-road capable performance trucks.
For Ram TRX owners who demand championship-level performance with street-legal reliability, the 3521H640 kit is the race-winning, complete bolt-on solution trusted by the fastest supercharged trucks on road and trail.
Key Features
- 2-inch equal-length mandrel-bent primaries for maximum scavenging
- 3-inch H.O. GREEN high-flow metallic catalytic converters
- Full T304 stainless steel with TIG welds and 3/8-inch flanges
- Merged collectors for optimal exhaust velocity
- Direct bolt-on to OEM mid-pipe no cutting required
- Dyno gains of 80–100 RWHP and 90–120 RWTQ
Product Notes
- 49-state EPA compliant not for sale or use in California or CARB states without exemption
- Fits 2021–2025 Ram 1500 TRX with 6.2L supercharged HEMI
- Includes O2 extensions and all necessary hardware
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime on stainless construction and 25,000 miles on catalytic converters to original purchaser.
Installation Notes
- Professional installation required lift and exhaust experience needed
- Remove factory manifolds and bolt headers to cylinder heads
- Connect catted pipes to collectors and OEM mid-pipe
- Torque flanges to 25-30 ft-lbs and run drive cycle for ECU adaptation
This Part Fits
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2021–2025 | Ram | 1500 | TRX - 6.2L Supercharged HEMI V8 |
Note: Fits all Ram 1500 TRX with factory exhaust. Crew cab only.
What's Included in the Purchase
- (2) 2" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
- (2) 3" H.O. GREEN Catted Connection Pipes
- Gaskets, Stage 8 Locking Bolts, Clamps and Hardware
- O2 Sensor Extensions
- Detailed Installation Instructions
- Part Number: Kooks 3521H640
Why Choose Kooks?
- Over 60 years of championship-winning exhaust engineering
- Handcrafted in the USA from T304 aircraft-quality stainless steel
- Limited lifetime warranty and dyno-proven performance
Frequently Asked Questions
-
Q: Does this fit my 2024 TRX?
A: Yes, direct bolt-on for all 2021–2025 Ram TRX -
Q: Will it cause a check engine light?
A: No, H.O. GREEN cats and extensions maintain proper O2 function -
Q: How loud is it?
A: Insane supercharged roar at WOT, refined without drone at cruise
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Heavy-duty box with foam protection.
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