Product Description
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.
Frequently Asked Questions:
Q: 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.
Q: 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.
Q: 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.
Q: 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.
Q: 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)).
Q: 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).