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Performance Design Carbon HR intake manifold lids offer owners of the Holley Ram intake models a lightweight. carbon fiber plenum upper. These top sections reduce weight, reduce heat soak, and add a unique engine aesthetic with the exposed weave cloth. Constructed from high-strength carbon fiber with high-temperature epoxy and bonded with high-temperature aerospace structural adhesive, each unit saves approximately 3 lbs. of mass versus the cast original lid. With a matching bolt pattern, the carbon plenum uppers will bolt to any existing Holley Hi-Ram, Mid-Ram, or Lo-Ram cast lowers. The throttle is moved up and rear-ward to improve the flow transition into the plenum and facilitate the carbon process. Order the model designed for your application needs. Other product features and specifications include: * Billet throttle body flange (90-105mm) * Plenum can be reversed on the Holley Ram lower * Carbon fiber-wrapped foam core plenum flange
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$899.99
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Performance Design XS intake manifolds break the mold of existing intake manifold architecture to maximize available space under the hood. When designing the optimum intake runner length and shape, the fuel rail gets in the way—so they moved it—inside the intake manifold! Those billet fuel rails feature an external quick-disconnect near the stock location. Testing proved these models, featuring injection-molded, glass-reinforced nylon construction, made horsepower and torque gains on a stock engine—with increasing gains as the engine got more aggressive with camshaft and exhaust upgrades! Other product features and specifications include: * Modular runners with three staggered lengths for best performance * Forward-facing throttle body flanges (90-101mm, 103mm, and 112mm) * Full assembly can be reversed on the engine * Fits under the cowl hood of a C6 Chevy Corvette * Factory MAP sensor location * PCV and canister purge solenoid OEM connections * Accepts standard EV6 LS3/LS7-style injectors * Injector extension wires pass through sealed grommets * Maximum recommended boost is 20 psi * Carbon fiber center bolt cover * Includes stainless steel hardware for installation * Includes molded port, plenum, and throttle seals
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$999.99
$899.99
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