LZ4/LZ9 Cam Spacers for VVT Delete

The VVT engines have become more popular for swaps, but without a cam option it is limited in performance.  Our spacers allow you to use the same cams we list for the 3100/3400/3500 engines and bypass the VVT setup completely.  Designed by WOT-Tech and made in the USA.  Each set includes a set of…

Seats and Seals for VVT Cylinder Heads

Hardened steel seats designed for the .500" valve guides used in the LZx cylinder heads.  Paired with a set of Viton seals, these work with our Stage 2 and 3 spring sets as well as the Comp double spring set.  

ARP 3500/3900 V6 VVT Head Stud Kit

This kit is for the 3500/3900 VVT V6 Engines.  Includes 16 studs, washers, and nuts.   It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on t…

Oil Bypass Valve

GM Oil Bypass Valve is a simple piece to remove and replace when you have a block cleaned for a rebuild.  

Comp 26925 Double Spring Kit

Dual Valve Spring Kit for the 3500/3900 VVT engines.  Includes the Comp 26925 spring set of 12, matching retainers, spring locators, and seals.  Optionally, the Manley keepers can be added if you would like a machined set vs the stock stamped steel keepers.  They are not required but are noticabl…

Custom Tuning (OBD2)

We no longer offer long distance tuning.  If you would like us to tune your vehicle, please call 574 968 7607 or email sales@wot-tech.com

VVT Delete Kit

If you are looking to install one of our performance camshafts meant for the non VVT engines, this is the kit for you.  Includes our cam bearing spacer set with performance bearings preinstalled.  Teflon coated bearings optional.  The timing set uses the same style chain and tensioner but for …

HPTuners MPVI 3

Yet another version of HPTuners is coming out soon and you can pre order yours to make sure you get one as soon as they arrive.  Comes with 2 credits.  MPVI3 continues the legacy of its predecessor with features like Bluetooth 5.0, an M8 motorsports-grade screw-on connector, RGB LEDs, and USB-C …

LZ4 / LZ9 Header Flanges

3/8" Thick Mild Steel Header Flanges Designed for the LZ4/LZ9 engine and their variants.  1 3/4" round ports with no overlap into the ports with the primary tubes installed.  Easy access to the spark plugs without removing the headers.

Forged 3500 LZ4 Pistons

Pistons are a 2618 Alloy, designed with the clearance in mind for the bore size specificed.  We recommend measuring the pistons before the block is bore/honed to be certain of final clearances.  Chromoly 4130 pins standard.  If you need a pin size other than stock, please contact us.  Pistons ar…

Forged 3900 LZ9 Pistons

Pistons are a 2618 Alloy, designed with the clearance in mind for the bore size specificed.  We recommend measuring the pistons before the block is bore/honed to be certain of final clearances.  Chromoly 4130 pins standard.  If you need a pin size other than stock, please contact us.  Pistons ar…