Looking to free up exhaust flow on your CT5-V Blackwing with a 1-7/8" tube option? Speed Engineering's 1-7/8" longtube headers are mandrel bent, TIG-welded, and CNC-machined from 304 natural stainless steel for maximum exhaust flow and over 25 rear-wheel horsepower over stock. These are headers only — this is not a direct bolt-on installation. Fabrication of connection pipes is required for proper fitment on the CT5-V Blackwing chassis, and O₂ sensor extensions are needed to complete installation.
⚠️ Important Installation Notes:
- Fabrication of connection pipes is required — these headers are NOT a direct bolt-on on the CT5-V Blackwing. Custom connection pipes must be fabricated for proper fitment
- O₂ sensor extensions are required — sold separately
Features:
- Full 1-7/8" Port-Matched Primary Tubes — Maximum flow from cylinder head to collector for aggressive LT4 performance
- 3" Collector — Optimized for strong low-to-mid RPM torque
- Mandrel Bent Tubing — Consistent tube diameter through every bend; no crimping, no restriction
- CNC Machined Flanges — Precision fit at the cylinder head for a leak-free seal
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on LT4 applications
- Compatible with 6.2L LT4 Supercharged Engines
Vehicle Applications:
Cadillac CT5-V Blackwing — LT4 6.2L Supercharged
- 2022 Cadillac CT5-V Blackwing — 6.2L LT4
- 2023 Cadillac CT5-V Blackwing — 6.2L LT4
FAQ
Are these headers a direct bolt-on?
No. These headers are NOT a direct bolt-on for the CT5-V Blackwing. Fabrication of custom connection pipes is required for proper installation on this chassis.
Do I need O₂ sensor extensions?
Yes. O₂ sensor extensions are required to complete installation and are sold separately.
What is the difference between these 1-7/8" headers and the 2" headers (25-1061) for the CT5-V Blackwing?
The primary tube diameter is the key difference. The 1-7/8" headers are a strong choice for most performance builds across a broad RPM range. The 2" headers deliver maximum exhaust flow for more aggressive builds with supporting modifications. Both require fabrication of connection pipes and O₂ extensions for the CT5-V Blackwing chassis.
How much horsepower do these headers add?
Speed Engineering's 1-7/8" longtube headers are dyno proven to add over 25 rear-wheel horsepower compared to stock exhaust manifolds on LT4 applications.
What material are these headers made from?
304 natural stainless steel with full TIG-welded construction and CNC-machined flanges.
Are gaskets included?
Yes. Standard graphite manifold gaskets are included.
Are these headers street legal?
No. These are race-only headers intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).
