SLP 455 HP Bobcat PerformancePac
COMPANY: SLP Performance Parts
VEHICLE: GTO
PART NUMBER: 29040
PRICE: $3,717.95
POWER GAIN: See dyno chart (rear wheels)
Designed for 2005-2006 cars, SLP's 455 HP Bobcat PerformancePac can wake up your Pontiac GTO's LS2 in a hurry. The system spec sheet starts with the same list of quality components as the company's 421 HP Bobcat package, and adds in a few notable extras. Long-tube, 1 3/4-inch ceramic-coated headers and a matching PowerFlo-X crossover pipe help further improve exhaust exhalation, and an SLP underdrive pulley reduces parasitic losses incurred in driving engine accessories. The icing on the cake is a set of SLP 1.85-ratio rocker arms, which come with titanium retainers, high-performance valvesprings, keepers, and new hardware.
All of these items bring total power to 455 flywheel horses, and this number is also of course a throwback to legendary Pontiac engines of years past. And you'll get the fender badges to let everyone know about it-that is, if they didn't already notice the incredible improvements in your GTO's sound quality! If a deep rumble isn't quite to your taste, an identical package with the quieter "Loud Mouth II" cat-back is available for a few bucks more. As a package, the total dollars spent equates to a savings of about $100 over buying each of the parts that comprise the kit individually.
Speed Inc. Heads & Cam Package-Patriot Heads
COMPANY: Speed Inc.
VEHICLE: GTO
PART NUMBER: N/A
PRICE: $2,999.99
POWER GAIN: 70-100 hp (rear wheels)
Providing gains of 70-100 rwhp over stock depending on camshaft aggressiveness, Speed Inc.'s mail order GTO heads & cam package includes Stage 2 ported Patriot cylinder heads featuring 2.05-inch intake and 1.57 exhaust valves, as well as the COMP cam of your choice, chrome-moly COMP pushrods, and an ASP underdrive pulley. To help ensure the added flow gets out, a set of Stainless Works long-tube headers with off-road pipe (not shown) are also included. Completing the kit are new NGK spark plugs along with all necessary hardware and seals. Did we mention mail order tuning is included as well?
Optional extra cost upgrades include AFR heads and a catted X-pipe. Don't have an LS2 under your Goat's hood? You're in luck: a near-identical package can be had from Speed Inc. for 2004 GTOs at the same price.
TSP Heads & Cam Package-Terminator Heads
COMPANY: Texas Speed & Performance
VEHICLE: Most LS2
PART NUMBER: N/A
PRICE: $2,369.00
POWER GAIN: 70-100 hp (rear wheels)
For those looking for a heads & cam package using an aftermarket casting, Texas Speed also offers a system featuring the Precision Race Components "Terminator" cylinder heads, which are based off of Edelbrock castings. Among other improvements, these heads have a thicker deck than a factory head, which is advantageous when used with big power adders. The Terminator heads use a 230cc intake runner size and feature a 62cc combustion chamber to net an 11.15:1 CR on a stock LS2 short-block with stock head gasket set. Standard issue are stainless steel 2.05/1.57 valves. The customer's choice of a TSP camshaft and a set of TSP hardened chrome-moly pushrods are also included in the package. Mail-order tuning is available for an additional $250, and if your tuning needs change within a year, TSP will retune for free (plus shipping).
SLP 350 HP F-Body PerformancePac
COMPANY: SLP Performance Parts
VEHICLE: Camaro / Firebird
PART NUMBER: 28020
PRICE: $725.90
POWER GAIN: See dyno chart (rear wheels)
Need more performance, but don't got a lot of cash? SLP can help you add some horses to your F-bod for scarcely more than a month's rent-and save $50 over the cost of purchasing all of the items individually. A high-flow airlid, performance air filter, Cold-Air Induction Package, and F-body Smooth Bellows help your LS1 inhale easier.
To add more bark and bite, a stainless steel, modular "Loud Mouth" cat-back exhaust system is included, and this system makes it possible to swap between the quieter muffler and louder resonator quickly and easily to suit your mood. (The stated part number includes the resonator only, but you can also order the system with the muffler, if you so desire). Capping things off are "350 HP" fender badges to let everyone know this isn't your typical ride. This particular part number includes dual/dual exhaust tips and is for 1998-99 vehicles, but PerformancePacs for all other model year F-bodies are available-as are your choice of dual/dual tips or 3.5-inch slash-cut tips.