For Chevy, Cadillac, Pontiac, and GM performance builds, selecting a cathedral-port LS intake manifold can significantly influence airflow during boost. The following selections focus on aluminum, 90+ millimeter to 102 millimeter inlets, robust TIG-welded fabrication, and compatibility with drive-by-cable throttle bodies. This guide highlights five models that balance fit, durability, and boost-ready performance for LS-based engines with cathedral-port heads.
| Product | Brand |
|---|---|
| Htostar Racing For LS Intake Manifold 102mm | Htostar Racing |
| YIUIY For LS Intake Manifold 102mm Black | YIUIY |
| YIUIY For LS Intake Manifold 92mm Silver | YIUIY |
| Htostar Racing For LS Intake Manifold 92mm | Htostar Racing |
| POSENG Intake Manifold 92mm Black | POSENG |
Htostar Racing 102mm Cathedral Port LS Intake
Designed for LS models with cathedral-port heads, this 102mm inlet manifold targets efficient airflow for boosted applications. Compatible with LS1, LS2, and LS6 engines featuring cable-drive throttles, it accommodates a taller 210mm height and includes one quarter-NPT vacuum port along with a rear MAP port. The unit uses 1/8″ thick T6061 aluminum with a 1/4NPT port for boost-related vacuum and a beefy build to withstand higher boost pressures. A practical option for Corvette, Firebird, GTO, and CTS-V builds seeking improved intake velocity.
YIUIY 102mm Cathedral Port LS Intake Black
This YIUIY manifold offers a 102mm aluminum construction with TIG-w welded fabrication, built for cathedral-port LS1/LS2/LS6 heads and LS-based C8 Gen. III/IV platforms. It targets a broad model range—from Corvette to TrailBlazer SS—ensuring compatibility with popular high-performance chassis. The robust 1/8″ aluminum sheet and included vacuum ports support reliable boost operation, with a focus on maintaining airflow efficiency under higher intake pressures.
YIUIY 92mm Cathedral Port LS Intake Silver
With a 92mm inlet, this YIUIY manifold provides a compact option for space-constrained builds while maintaining cathedral-port compatibility. Aluminum construction and TIG welding deliver sturdy performance, and the design supports vehicles ranging from Corvette to CTS-V. This model emphasizes durability and consistent airflow, suitable for boosted LS engines that require a more compact intake footprint without sacrificing boost performance.
Htostar Racing 92mm Cathedral Port LS Intake
This 92mm Htostar Racing manifold targets LS1/LS2/LS6 cathedral-port heads with a focus on boost-ready reliability. The design features a tall profile (210mm height) and aluminum construction with 1/8″ thick stock. Vacuum ports (1/4NPT & 1/8NPT) with a plug and a MAP port at the rear enable flexible vacuum and sensor routing. It’s a practical choice for projects that require a robust, cable-drive throttle setup and a strong air charge under boost.
POSENG 92mm Black Cathedral Port LS Intake
POSENG offers a 92mm throttle body-compatible cathedral-port intake crafted from 3mm-thick T6061 aluminum. TIG-welded for strength, it promises vertical mounting stability and a robust 30lb load capacity under boost. The manifold is designed to fit a broad range of LS engines (LS1, LS2, LS6, LQ4, LQ9, etc.) and is positionally suitable for Corvette, Firebird, and CTS-V platforms seeking improved airflow efficiency without compromising durability.
Buying Guide
Key considerations when choosing an LS cathedral-port intake for boost include compatibility, boost tolerance, and installation fitment. Evaluating the inlet size (92mm vs 102mm) helps balance top-end power against mid-range throttle response. Material and welding quality affect long-term reliability under vacuum and boost pressures; aluminum with TIG welding is common for durability. Consider throttle-body compatibility (drive-by-cable vs drive-by-wire) and the presence of vacuum ports for MAP sensors and vacuum accessories. Ventilation and port sizing influence tuning, so align the manifold with your engine’s intake plan and fuel delivery strategy. Finally, verify fitment with your specific model year and known chassis configurations (Corvette, CTS-V, GTO, SSR, etc.).
There are multiple angles to consider: performance gains versus cost, space constraints within the engine bay, and the risk of fitment issues with aftermarket fuel rails or valve covers. For boosted builds, choosing a manifold with solid vacuum port options and reliable construction helps maintain consistent air delivery and sensor readings. Review installation guides and community feedback for your exact vehicle combination to reduce trial-and-error time. If unsure, consult a performance shop with LS tuning experience to confirm the best match for your goals.