The factory exhaust manifolds on your LS-powered Pontiac G8, Chevrolet SS Sedan, or Caprice PPV are a known restriction. Speed Engineering's 1-7/8" longtube headers are a direct-fit, dyno-proven replacement that unlocks real exhaust flow, improves throttle response, and puts measurable power back in your hands — over 25 rear-wheel horsepower gained over stock.
Every set is mandrel bent, TIG-welded, and built from 304 natural stainless steel with CNC-machined flanges. The fit is precise, the quality is there, and the price leaves room for your next build.
Features:
- 1-7/8" Port-Matched Primary Tubes — Full-diameter flow from cylinder head to collector for maximum exhaust scavenging
- 3" Collector with Collector Spikes — Optimized merge geometry for strong low-to-mid RPM torque
- Mandrel Bent Tubing — Consistent tube diameter through every bend; no crimping, no flow restriction
- CNC Machined Flanges — Precision fit at the head and collector for a leak-free seal
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Longtube Header Design — Maximum scavenging efficiency compared to shorty or mid-length headers
- Clears Oil Cooler — No oil cooler relocation required on any listed application
- Dyno Proven — 25+ RWHP gain documented on 6.0L and 6.2L LS applications
Vehicle Applications:
Pontiac G8
- 2008 Pontiac G8 GT (RWD) — 6.0L L76
- 2009 Pontiac G8 GT (RWD) — 6.0L L76
- 2009 Pontiac G8 GXP (RWD) — 6.2L LS3
Chevrolet SS Sedan
- 2014 Chevrolet SS Sedan (RWD) — 6.2L LS3
- 2015 Chevrolet SS Sedan (RWD) — 6.2L LS3
- 2016 Chevrolet SS Sedan (RWD) — 6.2L LS3
- 2017 Chevrolet SS Sedan (RWD) — 6.2L LS3
Chevrolet Caprice PPV
- 2011 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2012 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2013 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2014 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2015 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2016 Chevrolet Caprice PPV (RWD) — 6.0L L77
- 2017 Chevrolet Caprice PPV (RWD) — 6.0L L77
Caprice Note: X-pipe and true dual exhaust setups may require modifications for proper fitment on Caprice applications.
FAQ
How much horsepower do these longtube headers add?
Speed Engineering's 1-7/8" longtube headers are dyno proven to add over 25 rear-wheel horsepower on 6.0L and 6.2L LS-equipped vehicles compared to stock exhaust manifolds.
Will these fit my Chevrolet Caprice PPV?
Yes. These are a direct-fit application for 2011–2017 Chevrolet Caprice PPV models with the 6.0L L77 engine. X-pipe and true dual exhaust configurations may require minor modifications.
Do I need to relocate the oil cooler for installation?
No. These headers are specifically engineered to clear the oil cooler on all listed applications with no relocation required.
What material are these headers made from?
304 stainless steel with full TIG-welded construction and CNC-machined flanges for a precise, durable, leak-free fit.
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)).
What engines does part number 25-1073 fit?
Part #25-1073 fits GM 6.0L LS2, L76, and L77 engines and the 6.2L LS3, covering the Pontiac G8 GT/GXP, Chevrolet SS Sedan, and Chevrolet Caprice PPV.
⚠️ 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).
