We now have RTD devices in stock, so you can tune and scan from your phone!
PRC 15-Degree 220cc As-Cast Cathedral Heads
Regular price
$1,820.69
Save $-1,820.69
Precision Race Components all new cylinder head castings completed with 220cc runners. For stock cubic inch 4.8/5.3/LS1/LS2 applications requiring a stock valve angle LS cylinder head with extra thick decks comparable to stock piston to valve.
Designed as a bolt on cylinder head with minimal change to pushrod length
TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
64cc CNC Machined Chambers
CHE Bronze Guides
2.045" Intake / 1.600" Stainless Valves
Factory Rocker Friendly!!*
Extra Thick Deck Surfaces For Power Adders
The all new 220cc cylinder head is finally available for customers looking for a bolt on 15 degree LS cathedral cylinder head. Think of this cylinder head as the ultimate 15 degree LS1/LS2 cylinder heads for guys wanting a stronger replacement to the LS1 / LS6 / LS2 factory casting. The perfect head for guys wanting a aftermarket casting that will retain the use of all there existing components.
Flow Data:
4.00" Flow Plate - No Exhaust Pipe
LIFT
INTAKE FLOW
EXHAUST FLOW
.100"
67 CFM
55 CFM
.200"
145 CFM
113 CFM
.300"
207 CFM
166 CFM
.400"
252 CFM
200 CFM
.500"
292 CFM
215 CFM
.600"
304 CFM
226 CFM
.650"
311 CFM
228 CFM
Stock rocker arms will cause increased guide wear in applications over .600" lift. Roller rockers can help to reduce this wear.
Our email tune is the fastest, cheapest way to get tuned in a few easy steps:
Fill out our handy online form during checkout
Email your tuning file to mailordertuner@gmail.com
We’ll email your tuned file back to you ASAP, usually within 1-3 business days
Note: you must have your own tuner such as an MPVI2+,MPVI3, MPVI4 or RTD to install your new tuning file.
Marcelino R.
Great job with their tune......awesome customer service.....great knowledgeable people.........I love the service
GM LS7 Lifter Set - MailOrderTuner
Regular price
$180.00
Save $-180.00
IN STOCK
NO MANUFACTURER WARRANTY ON THIS PRODUCT
GM/Delphi LS7 style replacement stock lifters for all LS engines without active fuel management! These lifters are the replacement part for anyone looking to upgrade their LS engine with a new set of GM lifters. They are also a great option for those wanting to remove the factory AFM/DOD lifters from their L76, L99, or gen 5 LT1 engine. These lifters have several upgrades that make them a perfect addition to your LS or gen 5 LT1 build.
*Non-DOD Applications Only
Texas Speed and Performance Cathedral "Dual Spring" Cam Package
Regular price
$786.99
Save $-786.99
Your Choice of Camshaft, TSP Spring kit, and Hardened Chromoly Pushrods
This Package Includes the Following Items:
Your Choice of Camshaft
Includes TSP .660" Dual Spring Kit w/ PAC Racing Polished Springs, Titanium Retainers, Hardened Spring Seats, and New Valve Stem Seals
Texas Speed Hardened Chromoly Pushrods
We have two options listed for our dual valve spring kits. The default option will use our PRC integrated one-piece seat and seal that simply pushes in place. The other option is for the separate two-piece seat and seal that you typically find in any dual valve spring kit. The two-piece kit will require separate installation of the valve seals after the seats are in place, and it does require a specific tool to make sure that the valve seals are installed properly (i.e. not crooked, torn, or not installed fully). Our integrated seat and seal will make your installation much easier because it is virtually impossible to install it incorrectly! You can choose either kit for no additional charge. We have a picture listed when you select each spring kit so you can see the actual differences in the two kits.
This is the perfect upgrade package for customer looking for all the aftermarket parts needed to do a camshaft swap. Typical gains will range from 30 to 65 rear-wheel horsepower from a TSP camshaft swap alone!
We do offer the optional adjustable pushrod length checker that allows you to verify the correct pushrod length needed for your setup. We can give you a good idea of what is typically used with your engine, lifter brand, etc., but it can certainly vary from setup to setup. You can vary up to .050" in pushrod length depending on which camshaft core the cam manufacturer uses! This is NOT information that any camshaft manufacturer includes with their camshafts, so it is always best to verify the length you need to avoid any valvetrain issues.
Because we cannot stock every camshaft with every lobe separation angle, if you need parts quickly, we encourage you to call us to check availability of the camshaft you want. The LSA(s) we typically stock for each camshaft is listed next to each camshaft. Some camshafts will have to be custom ground and drop-shipped from the manufacturer directly to you!
HP Tuners RTD 4 -
Regular price
$300.00
Save $-300.00
This is only the device, the tune is not included -
TheHP Tuners RTD4is the next generation ofRemote Tuning Devices, built for seamless wireless tuning, diagnostics, and datalogging. Designed specifically for professional tuner workflows, the RTD4 works hand-in-hand with theHP Tuners Tune Delivery Network (TDN)to deliver Dieselr’s custom calibrations directly to your vehicle — no laptop required.
Key Features:
Supports 300+ Vehicle Controllers– Compatible with the latest HP Tuners-supported platforms, including CAN and VPP protocols.
Wireless Tuning via TDN App– Flash tunes, send datalogs, and receive updates right from your iOS or Android device.
Diagnostics Anywhere– Read and clear DTCs on the go.
Faster Transfer Speeds– Built-in Wi-Fi hardware (enabled with future firmware update) for rapid file delivery and logging.
Secure Workflow– Customers cannot access VCM Editor, ensuring calibration integrity and tuner IP protection.
Fully Compatible with VCM Scanner– For complete diagnostics and logging functionality.
How It Works:
Readyour vehicle’s data using the RTD4.
Sendfiles to the MailOrderTuner tuning team via the free TDN app.
Receiveyour custom calibration.
Flashdirectly from your smartphone.
Why Choose the RTD4 from MailOrderTuner? We don’t just sell you the device — we connect you to our tuning network for precise, dyno-tested calibrations built forreal-world drivability and performance. Whether you’re on the track, trail, or highway, the RTD4 gives you professional-grade tuning power in your pocket.
Note:Base price is for the RTD4 device only. HP Tuners adapter cables, credits, and tuning are sold separately.
PRC As-Cast 225cc LS1/LS2 Cathedral Heads
Regular price
$2,203.19
Save $-2,203.19
Precision Race Components all new as-cast cylinder heads completed with CNC machined chambers & valve guides. For LS1/LS2 applications requiring a high flow aftermarket cylinder head at a unbelievable price!
MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE USA!!
As-Cast 225cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow!
Small Bore Configurations for extra compression applications while keeping good piston to valve clearance
Large Bore Configurations for customers looking for bigger bores such as stroker or boost applications
62cc or 68cc CNC Machined Chambers (Can be milled to your desired specs)
2.06" Intake / 1.600" Stainless Valves
Utilizes Factory LS1 Rocker Arms
Includes TSP Dual Spring Kit w/ PAC .660" Valve Springs!
***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***
The all new PRC 225cc As-Cast cylinder heads are finally available for customers looking for the ultimate as-cast cathedral LS heads available. The new PRC as-cast intake port has been flow bench tested to flow over 320cfm & can support everything from smaller camshaft street engines all the way to all out race engines. This cylinder head is a combination of a max-effort, high-flowing port combined with a smaller chamber designed for max power in stock cube applications. You have your choice of the 62cc chambers used in the PRC 227cc cylinder heads or the 68cc chambers used in the PRC 237cc cylinder heads. We can mill additionally to get to your desired chamber size for no additional charge!
Flow Data (4.00" Flow Plate - No Exhaust Pipe):
LIFT
INTAKE FLOW
EXHAUST FLOW
.100"
68 CFM
56 CFM
.200"
145 CFM
113 CFM
.300"
210 CFM
164 CFM
.400"
257 CFM
200 CFM
.500"
300 CFM
214 CFM
.600"
318 CFM
229 CFM
.650"
321 CFM
230 CFM
Chad R.
Good price
GM LS7 Lifters and LS2/LS3/LS7/L98 Lifter Tray - MailOrderTuner
Regular price
$229.40
Save $-229.40
IN STOCK
Chevrolet Performance LS7 lifter set is an OE hydraulic roller lifter that can be used in all non-DOD LS and Gen 5 LT engines.
LS7 Lifters – (FAQ’s) Frequently Asked Questions
Mail Order tuner proudly supplies the natural LS7 lifters for LS engines. These lifters are the perfect replacement of the standard lifters known to start as noisy- Often with a sound and evolve into much more of an issue. LS7 lifters prevent damaging the hydraulic camshaft and causing expensive labour and help save our time and headaches with other filters.
Lifters in factories are loaded with springs, and the problem occurs in these loaded lifters and is famous for failing and crucially eating away the camshaft. This can lead to severe problems that can easily be prevented by upgrading the LS7 lifters. These wrong locations and preload result in open values, and therefore this leads to loss of power. These filters are designed to replace the standard filters and will surely suit all LD engines in your factory. We assure you that all our products are manufactured with high-quality material on which you can trust the reliability and performance of the LS-powered vehicle.
This is a complete set of 4 Lifter Trays
GM LS2 lifter tray. OE replacement part designed to hold the lifters in place. These can also be a direct replacement in the Gen-3 engine blocks (i.e. LS1, LS6, LQ9, etc.).
