Start here by first selecting the Year Make and Model of your vehicle to start shopping for performance parts and accesories taylor made for your car or truck. You can also choose from our popular car links below for a faster way to shop.
Search by Part Number, Brand, or by Year make Model, and or Part.
If you are having problems logging in, try the following:
1. Be sure Cookies are enabled.
3. Refresh the page.
If you are still experiencing problems, please clear your cookie cache.
Create a LMPerformance.com account today and receive the benefits of a personalized shopping experience. With a LMPerformance.com account, you will be able to place orders faster, create wish lists, check the status of your recent orders, print invoices, get access to special promo codes, and more.
Shop for performance parts and accessories for you vehicle by product. Our performance parts are grouped by category then broken down by type. For example if you wish to search for a Air Filter you would first select "Induction" then for type Select "Air Filters". You can then filter the results by brand or the make model and year of your car.
Looking to improve or repair your classic Pontiac GTO or Firebird muscle car, your newer G or many other fine Pontiacs, then you are in the perfect place to find what you need at a competitive price, great customer service and free shipping. The Team at Late Model Performance knows you are understandably selective in your search for the performance aftermarket exhaust upgrade you crave so we have provided you with a myriad of possibilities from the sans pareil manufacturers of performance exhaust systems. Manufacturers like the inimitable KOOKS, who have been making the highest quality & best performing Custom Stainless Steel headers and exhaust systems on the market since 1962 and are one of the pioneers in the stainless steel header revolution. Choose from Exhaust Systems with Off-Road X-Pipes, GREEN Catted X-Pipes, or Catted X-Pipes for your iconic Firebird or an Axle-Back Exhaust for your Pontiac G8, or a stainless steel complete exhaust system for your GTO that connects to Kooks Mid-Pipes and Factory OEM Exhaust. Headers and Mid-Pipes can be purchased separately and include: Long-tube Headers from KOOKS for your Pontiac G8, GTO and Firebird; or Shorty Headers with GREEN Catted Connection Pipes and Catted Connection Pipes for your Pontiac G8; or Mid-Pipes purchasable as Off-Road X-Pipes, GREEN Catted X-Pipes, and Catted X-Pipes for the G8 and as Off-Road Y Pipes and Catted Y-Pipes for your Firebird. Also available and manufactured with the same superlative quality as the complete Exhaust System are Header Connection Pipes for your GTO AND G8 in Off-Road Connection Pipes, GREEN Catted Connection Pipes, Catted Connection Pipes.
Another laudable exhaust system option is Billy Boat, a line of exhaust products that start with T-304 stainless steel, the epitome of materials practical for after-cat exhaust applications, mandrel bent on sophisticated CNC machinery for a precise fit and uninterrupted exhaust flow. B&B's use of T-304 stainless steel flanges offers high strength and absolute resistance to harsh elements and all hangers, resonators, and tips are T-304 stainless steel as well. Consider the Tri-flo Exhaust for Trans Am, Firebird and Formula; or Single Cat and Twin Cat Exhausts for Firebird, Formula and Trans Am and Dual Outlet Twin Round Tips Exhaust for your Solstice to improve your performance on the street and at the track. Billy Boat Performance Exhaust mufflers have been developed in-house for over 25 years enabling them to give you a primo product and each muffler is tuned to match its application for an incomparable performance gain and sound quality combination. For strength the muffler end-plates are radiused at the inlet and outlet preventing premature cracking and B&B uses reinforcing gussets when necessary. B&B offers 3" round tips with a rolled edge, 4.5" oval rolled edge tips, 5.25" oval rolled edge tips or DTM style tips for European applications. The Billy Boat Performance Exhaust system has been sound perfected by the use of two different packing materials and as many as three separate SCC's inside the muffler creating the perfect harmony at any RPM range.
Still another choice for your Pontiac exhaust system, headers and mid-pipes is the preeminent AMERICAN RACING HEADERS line with several possibilities available for the discriminating owner. All American Racing Headers are engineered and constructed using 304 Stainless Steel and are fabricated with precision cut, 3/8-inch warp-resistant and leak-free stainless steel flanges. Each primary tube is sized for the individual engine output to generate the most significant horsepower with the least amount of compromise created by tight engine bay parameters. Efficient flowing, state-of-the-art merge collectors that are tuned for HP and torque maximization are used in each application and each header design has been tested in the extreme to ensure it delivers the performance gains you demand. And for your classic muscle cars like the GTO and Firebird, American Racing Headers designed high quality 304 S/S headers for your small block powered 64-77 A-body. Designed for conventional bolt pattern cylinder heads with 3/8 thick flanges, tig welded and hand ported inlets, excellent tube routing for great fit and merge collectors with scavenger spikes, these headers have it all and are available in 1-5/8, 1-3/4 and 1-7/8 primaries with 3 or 3-1/2 collectors. Exhaust Systems are available in Race Only F-Body LS1 for the Firebird with Y-Pipe with and without Cats; the Long System with Cats and Y-Pipe; the F-Body Header Pair; LS1 Swap Header Pair; LS1 Swap Detroit Speed Header Pair; the Long Tube Off-Road Y-Pipe; the Long Tube Catted Y-Pipe. For your GTO choose from a Header-back Exhaust and a Long System with and without Cats; a Long Tube Header with Connection Pipes and without Cats. For your G8 there is available the Long System and X-Pipe with and without Cats; and Long Tube Headers and Down Pipes. For the Pontiac Firebird peruse the selection of Mid Pipes (Y-Pipes) available with and without cats, the LS1 Long System with Y-Pipe with and without Cats, The Race Only Header Pair, LS1 Swap Header Pair, the LS1 Swap Detroit Speed Header Pair, Long Tube Off-Road Y Pipe and Catted Y-Pipe, and for the GTO the Long System with and without Cats, X-Pipe Long Systems with and without cats, and for the G8 the Long system with X-Pipe with and without cats, Long Tube SS Headers and Down Pipes, Headers w/connection Pipes with and without Cats.
Even more to choose from with the outstanding STAINLESS WORKS whose Exhaust Systems, Headers and Mid Pipes (Y-Pipes) for your Firebird and GTO and Solstice are made from only the finest Everlast 304 stainless steel, a premium mil spec grade of stainless steel that is slightly more expensive than standard stainless steel materials. Stainless Works products will never red-rust like the cheaper 400 series stainless steel used by others. In addition to designing their wide range of after-market headers and exhausts, they manufacture them on-site, right here in the United States by skilled American craftsmen whose penchant for quality is unsurpassed. For your Firebird they offer the Chambered Cat-back, Cat-back Systems with Turndown Tailpipes and Y-Pipe Off-Road and the Small Block Cat-back Exhaust; and for your GTO Exhaust S-Tube, Chambered, Turbo Chambered - slash Cut with X-Pipe, Turbo Chambered-Oval tip, Chambered round-Slash cut with X-Pipe and Many others, and for the Solstice there is the Exhaust and Cat-back Exhaust Systems. The Mid Pipes (Y-Pipes) are varied including Catted, Off-Road, Y-Pipe, High Flow Off-Road, Aluminized Off-Road, High Flow Y-Pipe, Dual Flow Y-Pipe, Cat High flow Y-Pipe and Small block High Flow Y-Pipe. LMPerformance can also help with Headers from Stainless Works for your Firebird, Formula, Trans Am, GTO and Solstice in a variety of compilations from Catted to Off-Road, Small Block, and Mill Finish that can be selected by placing your Pontiac Model and year in the drop down boxes provided making it easy to get the perfect header to meet your needs.
Pypes' Exhaust systems, one of the paramount manufacturers of exhaust systems on the market for price and superior quality can bump up the power in your Firebird, Formula, Trans Am, G8, Grand Am, Grand :Prix and GTO with their variety of parts for your exhaust system. Pypes exhaust systems and crossover systems are a preeminent choice of car enthusiasts because they are made of stainless steel materials for quality and durability and the crossover pipes include dual 409 stainless reinforcement plates at the welds where they are needed most. All pipes are mandrel bent, to allow for the maximum flow of exhaust gases, which boosts acceleration and they are fabricated utilizing the highest quality materials and the smooth, seam-coated, 16 gauge, mandrel-bent, aluminized steel pipe resists corrosion, extending the life of your system. Take a look at the selection of parts for your Firebird, Formula, Trans Am including Exhaust Manifolds, Exhaust Tailpipes and Exhaust Tips, Exhaust Down Pipes, Exhaust Manifolds, Exhaust Hangers, Mid-Pipes (X-Pipes and H-Pipes), and Exhaust Tips. Full Exhaust Systems for your GTO include Axle-Back, Crossmember-back, Violator, Street Pro, Race Pro in various styles depending on your Pontiac Model and year car and your tastes. Most of the Pypes full systems have a custom designed X-pipe, a unique and convenient way of adding electric cutouts to your Xpipe with X-Change. Expect to gain 15-25 HP on all of our crossover models and the open Port Exhaust provides a straight path when uncapped yet still utilizes the benefits of our crossover technology for an extra 10-15 HP. X-Change is also the perfect crossover to use when adding HVE10 electric cutouts. Pypes full exhaust systems include a choice of 3 different mufflers: the Violator Muffler, Pypes' loudest offering, the StreetPro, a straight through perforated core muffler type offering popular with the Muscle car customer as well as late model muscle cars, and the RacePro, the quietest muffler type for those highly modified muscle cars. And for the Pontiac G8 we offer the Axleback System, a fully stainless Axleback kit that will restore some nice aggressive tone and free up about 8 horsepower. Dual wall tips are standard with this system and installation is extremely easy and takes about 20 minutes and doesn't require a lift or jack stands. And New from Pypes for your G8, the Phantom Series Cat-Back Systems, a new spin on their already popular line of cat-backs for modern muscle cars that feature all the same high quality features you have come to know of Pypes systems but include black high temp powder coated tips. The powder coating is applied directly over the 304 stainless tip to give you that stealthy look and maximum longevity. The G8 is a powerhouse but with all those cats, resonators and mufflers, it sounds horrible coming off the showroom floor so consider an Axleback kit to help restore some nice aggressive tone. We also can fill your Exhaust Manifold needs for your Grand Prix and Grand Am and Firebird with Pypes that are made from high quality ductile iron using brand new molds which produce a cleaner look and better performance with their over-sized 2.5" exit flanges and they come complete with all mounting hardware and high quality gaskets.
Since 2001, LMPerformance has worked closely with SLP Performance to offer customers a wide range of performance enhancements to the American muscle car, perhaps the best known of which is its loudmouth exhaust system available for your Pontiac. For your Firebird the SLP’s F-Body cat-backs have always been the best-performing exhaust systems in the business and now they’re the most versatile with industry-exclusive modular design architecture. This line of systems can be quickly reconfigured to fit changing performance, noise-level, and sound-quality requirements by simply loosening a few band clamps, swapping muffler types, retightening, and you’re done. No other exhaust offers this level of performance and adaptability! For your Pontiac G8 consider the Loudmouth Exhaust from SLP for race-proven performance and a powerful deep muscle-car sound to match. This affordable, easy-to-install kit eliminates the two rear factory mufflers entirely, drastically reducing backpressure for enhanced power and a mind-blowing performance sound. (note: This Kit DOES create interior cabin resonance) This system will give your G8 GT a 10hp increase over stock and eliminates the two rear mufflers and replaces them with two 16 long 2.5 O.D. stainless steel tubes. The Axle-Back Exhaust with a PowerFlo™ rear-axle back exhaust system will give your G8 GT a 7hp increase over stock and includes a pair of our PowerFlo™ mufflers, which uses a straight-through design and fiber-wrapped perforated core to significantly outflow traditional chambered and turbo-type mufflers. A Loud Mouth® II modular catalyst-back exhaust system for your GTO can increase horsepower and torque and provide great sound from a pair of stainless bullet mufflers.. The additional performance comes from the free-flow design and built-in PowerFlo-X Crossover system and features a pair of distinctive 3.5” dual-wall stainless steel tips that look great. The tips have an angle cut and can angle downward in a traditional style, or rotated at a 90 degree angle so they match the curving shape of your rear valence. The Grand Prix PowerFlo catalyst-back exhaust system can provide extra horsepower with a low, muscle car rumble and features a pair of big 3.5-inch slash-cut stainless polished tips for a muscle car style that will look great on your car. The exhaust system is hand-crafted from stainless steel and the tubing is bent on state-of-the-art CNC bending equipment using mandrel-bend tooling to minimize exhaust gas restrictions that come with factory systems, is covered with our Limited Lifetime Warranty and is emissions-legal in all 50 states. Also purchasable from SLP, Air-lid, Cold Air Kits, Fan Switches, Floor Mats, Headers, Mid Pipes, Mufflers, Oil Pumps, Pulleys, Push Rods and Roll Control Kits for your Firebird and for your GTO: Mufflers, Oil Pumps, Pulleys, Push Rods, Roll Control Kits, Skip Shift Eliminators, Thermostats and Timing Chains and for your G8: Headers, Pulleys, Skip Shift Eliminators and Thermostats. Shop for your Pontiac SLP part seven days a week, 24 hours a day on the LMPerformance web site and get an outstanding part at a terrific price and with free shipping.