Downpipe Exhaust

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Upper Coolant Tube for 2017-2025 L5P 6.6L Duramax Chevy/GMC 2500HD/3500HD Coolant Pipe Kit | SPELAB
Jeff
Upper Coolant Tube for 2017-2025 L5P 6.6L Duramax Chevy/GMC

much cheaper than big brand and seems good quality, thank you Spelab.

Upper Coolant Tube for 2017-2025 L5P 6.6L Duramax Chevy/GMC 2500HD/3500HD Coolant Pipe Kit | SPELAB
5R110 Transmission Pan for 2003-2010 Ford F250 F350 F450 6.0L / 6.4L Powerstroke Super Duty | SPELAB
James Atkins
Great low cost upgrade

Price was great w heavy discounts. Great 5R110 6.0 powerstroke aluminum, Red, deep pan. W bolts and gasket. Great packing and instructions.

5R110 Transmission Pan for 2003-2010 Ford F250 F350 F450 6.0L / 6.4L Powerstroke Super Duty | SPELAB
Gen-2 CCV Reroute to Exhaust Kit for 2011+ Ford 6.7 Powerstroke F250 F350 F450 F550
Camron Presley
Quality product and loaded kit

This kit came with everything I needed to get the job done. There's a great SPE lab video online for installation help. Every piece felt quality and was simple enough to put together. Had extra hose after running all the way to the back of my rig so there's plenty provided. I just ran mine to atmosphere so there's a popcorn sound at the back of my rig now but it doesn't smell terrible. Definitely recommend this upgrade for anyone who wants a healthy engine. As for how hard the installation is, if you can change the CCV box you can install this kit.

Gen-2 CCV Reroute to Exhaust Kit for 2011+ Ford 6.7 Powerstroke F250 F350 F450 F550
Thermal Bypass Valve for 2013–2024 Dodge Ram 2500/3500 6.7L Diesel | SPELAB
Jay Combs
Works perfectly - Note on the O-rings!

Installed this SPELAB thermal bypass valve alongside a deep pan upgrade and the setup works flawlessly. Trans fluid temps drop fast and stay right where they should be.

The overall fit was great and the build quality feels solid. I noticed a past review complaining about the O-rings being the wrong size—just wanted to clarify that those O-rings aren't for the bypass block itself; they are meant for the metal threaded filter adapter. Don't let that review throw you off. Solid 5 stars!

Thermal Bypass Valve for 2013–2024 Dodge Ram 2500/3500 6.7L Diesel | SPELAB
Upper Coolant Pipe for 2011-2016 LML 6.6L Duramax Radiator Pipe | SPELAB
Chase Lee

Surprisingly fast shipping and decent quality with half of big brands price... will come back!

Upper Coolant Pipe for 2011-2016 LML 6.6L Duramax Radiator Pipe | SPELAB
Upper Coolant Tube for 2017-2025 L5P 6.6L Duramax Chevy/GMC 2500HD/3500HD Coolant Pipe Kit | SPELAB
Dsellis
fits well, would be better with instruction

fits well, would be better with instruction.

Upper Coolant Tube for 2017-2025 L5P 6.6L Duramax Chevy/GMC 2500HD/3500HD Coolant Pipe Kit | SPELAB
Upper Coolant Pipe for 2010-2024 6.7L Dodge Ram 2500HD/3500HD Radiator Pipe | SPELAB
Yeagers
It was a great experience.

love this red! Customer support is also very helpful. Hope it will last.

Upper Coolant Pipe for 2010-2024 6.7L Dodge Ram 2500HD/3500HD Radiator Pipe | SPELAB
Coolant Hose Kit for 2011+ 6.7 PowerStroke Radiator Hose Kit | SPELAB
Anonymous
Love it! Fits my 2017 F250

Love it! Fits my 2017 F250.

Coolant Hose Kit for 2011+ 6.7 PowerStroke Radiator Hose Kit | SPELAB
5'' Downpipe Back Duals 2011-2016 LML 6.6L Duramax DPF Delete Race Pipe GM 2500/3500|SPELAB
Quentin Dale
5” exhaust

The fitment was fantastic And it went together really well and fast

5'' Downpipe Back Duals 2011-2016 LML 6.6L Duramax DPF Delete Race Pipe GM 2500/3500|SPELAB
4'' DPF Back Exhaust Single Side Exit 2011-2016 6.7L Powerstroke Ford F250 F350 F450
Arthur Maisner III
4 inch dpf back exhaust

Great shipping. Great product. Was easy to install even though I had to cut some pipe off but overall happy with product

4'' DPF Back Exhaust Single Side Exit 2011-2016 6.7L Powerstroke Ford F250 F350 F450
3.5" Intake Manifold with Heating Element for 2007-2024 Dodge Ram 2500/3500 6.7L Diesel | SPELAB
John Bitler
Intake Manifold

Solid intake manifold, no fitment issues.

3.5" Intake Manifold with Heating Element for 2007-2024 Dodge Ram 2500/3500 6.7L Diesel | SPELAB
Intake Horn/Manifold Grid Heater for 2007-2024 Dodge Ram 2500/3500/4500/5500 6.7 Diesel | SPELAB
Matt Richmond
Perfect

Fit perfect and was of high quality material I have had the plate on my truck for about 2 weeks now and it is working great thanks SPELAB

Intake Horn/Manifold Grid Heater for 2007-2024 Dodge Ram 2500/3500/4500/5500 6.7 Diesel | SPELAB
SPELAB 4‘’ Cold Air Intake Kit For 2003-2007 Ford 6.0 Powerstroke Diesel F250 F350 F450 F550
Keegan Little
Great for the money

The cold air intake was easy and fast to install. it looks great and boosted my truck up a little for performance without breaking the bank. it’s the best bang for your buck even if your truck is stock or built it’s worth the money

SPELAB 4‘’ Cold Air Intake Kit For 2003-2007 Ford 6.0 Powerstroke Diesel F250 F350 F450 F550
Worry-Free Purchase
Adam Santavy
2018 ram 2500

hard parts are amazing and everything went together great

Worry-Free Purchase
Intake Horn/Manifold Grid Heater for 2007-2024 Dodge Ram 2500/3500/4500/5500 6.7 Diesel | SPELAB
Cody Osborne
Works Great

Install was easy and straightforward. Everything lined up nice. Peace of mind knowing there are no worries about potential destroying my engine, due to a nut.

Intake Horn/Manifold Grid Heater for 2007-2024 Dodge Ram 2500/3500/4500/5500 6.7 Diesel | SPELAB

FAQS

Yes, a catless downpipe will likely trigger a CEL on most vehicles. The OBD-II system flags the downstream O2 sensor for abnormal readings after the catalytic converter is removed (P0420 or similar codes). Pair your downpipe with a tuning solution that disables factory catalytic monitoring, or install a catted downpipe to stay emissions-compliant.

A downpipe replaces just the single component between the turbo and the rest of the exhaust. A full DPF delete kit replaces the entire exhaust tract including the Diesel Particulate Filter for unrestricted flow from turbo to tailpipe. Start with a downpipe if you're already tuned; go for an all-in-one kit if you need a complete delete solution.

The 2017-2025 GM L5P 6.6L Duramax requires a 3.5-inch downpipe. SPELAB's L5P downpipe is available in standard or black ceramic-coated finishes at $228. Earlier Duramax models like the LML use a 3" downpipe. Pair the upgrade with a DPF delete tune—the factory calibration will restrict performance gains without matching ECU changes.

DIY is possible for experienced mechanics. Expect 2–4 hours with basic hand tools. Challenges include removing rusted factory bolts (use penetrating oil first), aligning the new downpipe with the turbo outlet gasket, and sealing joints with high-temp exhaust sealant. If working under a lifted truck and fighting rusted hardware isn't for you, budget $150–$300 for professional installation.

Yes. The factory downpipe is one of the first flow restrictions in a diesel exhaust system. A smooth, larger-diameter downpipe reduces turbo backpressure and lets the turbo spool faster. Real-world gains are 15–40 HP depending on platform and tuning level. Combined with a full delete kit and ECU tuning, gains can exceed 100 HP on platforms like the LML 6.6L Duramax.