{"product_id":"chevy-corvette-5-5-zr1-performance-packages-2026","title":"Chevy Corvette 5.5 ZR1 Performance Packages (2026+)","description":"\u003cp\u003eWant to add more horsepower to your C8 ZR1 and don't know exactly how? Take the guesswork out of things and allow Peitz Performance to take your ZR1 to the next level with our dyno tested and proven packages! We developed these these packages with overall driveability and durability in mind, not just peak horsepower and torque. Dyno Results shown include variants of our C8 ZR1 Charlie package where you can elect to go with the standard offering of a Halltech airbox on 93 with our tune using HP Tuners or with the option of adding MS 109 race fuel to the mix. You can use the HP Tuners MPVI 4 to swap between the 93 and MS 109 variants. E85 results are currently pending and new options will be available soon.\u003c\/p\u003e\n\u003cp\u003eThrough extensive testing we have found tuning the car on 93 can net you up to roughly 80 lb ft and\/or 20 horsepower peak, but the power under the curve is what tells the real story. The gains you experience will depend on how much boost you command and when. We can cater to you by offering more low end horsepower and torque or give up some low end for more top end power. The biggest thing we fought was octane while running 93, especially at the top end of the run. Once switching to MS 109 gains are instantly noticeable everywhere and the car comes alive! Other race gases which are comperable will net similar results. Its important to note that while on 93, peak horsepower gains are not substantial, however the power gains \"under the curve\" are very real (up to 90 horsepower in some spots). So you can still enjoy your car on 93\/91!\u003c\/p\u003e\n\u003cp\u003e---\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll packages include an unlock from HP Tuners and tuning support from Peitz Performance. Additionally, all packages include an MPVI 4 (unless you select that you already have an MPVI 4). After purchasing the package, we will reach out to you and coordinate for you to send your ECM to HP Tuners for the unlock. You will receive your ECM back with an MPVI 4 if we do not send you one separately. After getting your ECM unlocked, simply plug your HP Tuners device directly into the OBDII Port, connect the MPVI 4 to your laptop, read the stock file out, and send it to Peitz Performance. Peitz Performance will write the tune and send it to you and walk you through the process from there.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHorsepower\/torque gains (on our Mustang dyno):\u003c\/p\u003e\n\u003cp\u003eCharlie 93 Octane (Halltech Airbox and tune) - 22 HP 74 lb ft *see graph for more details\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCharlie MS 109 Option - 131 HP 150 lb ft *see graph for more details\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCharlie 93 Octane w\/ Halltech Airbox and PPT downpipes - results pending\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCharlie MS 109 Option w\/Halltech Airbox and PPT downpipes - results pending\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCharlie E85 w\/Halltech Airbox and PPT downpipes - results pending\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e**See attached Dynojet graph for our Charlie package showing test results from Sam Tech in Houston! We made a staggering 1139 horsepower and 1006 lb ft of torque!**\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e ---\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIf you have already had your ECM unlocked and have an MPVI 4 device, select the appropriate options for just tuning support from Peitz Performance!\u003c\/p\u003e\n\u003cp\u003e---\u003c\/p\u003e\n\u003cp\u003eResults pending for the addition of our exclusive Peitz Performance catted downpipes! Be sure to ask our sales team for updates on this as we continue to finalize additional research and development.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/syxLeG1OUVg?si=AD1iq-1PYTFSvyHQ\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Peitz Performance Tunes","offers":[{"title":"Default Title","offer_id":46941356818583,"sku":null,"price":4734.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0429\/7628\/0727\/files\/MPVI44.jpg?v=1775409130","url":"https:\/\/www.peitzperformancetunes.com\/products\/chevy-corvette-5-5-zr1-performance-packages-2026","provider":"Peitz Performance Tunes","version":"1.0","type":"link"}