Update – I moved to my own house and Project Leopard

Since the middle of November 2021, I started to slowly move in. My biggest thing was the garage and setting it up. I tackled it piece by piece (not counting the house and other things). Epoxy the floor, install LED lights, set up storage and work table, install ceiling racks, and something I didn’t expect to get, but lucked out on… a 12ft wide garage cabinet set up for free (from CL).


Anyways, Project Leopard was dormant because Marco was on vacation and the RB25det was at a standstill as it has been for over a year.

Hung said he would dial in the suspension, so I ordered all new parts for it. So that will be done shortly.

Marco came back from his vacation and told me to order up parts. intake/exhaust manifold gaskets, timing belt (which was there already), Timing tension bolts and water pipe.

The water pipe erosion wasn’t a new issue, but Marco told me before it was okay to reuse. So I said reuse for now (that was months ago). He brought it up a few weeks back again, so I was able to ask Aaron of Boost Doc about his product and he helped me out!!!

I also ordered the upgraded ARP timing tensioner hardware kit.


When I first started to buy everything for the RB25det, I came across this upgrade kit from Boost Factory. For some reason, I didn’t order it. I think I wanted the engine to get to that level as it was just in parts back then. So when Marco asked about this, I decided to just get the ARP upgraded kit.

This is our upgrade option when replacing the OEM timing belt tensioner bolt & stud on your RB engine. ARP does not sell a direct solution so we buy each piece individually and modify the stud to match the OEM fitment before sending out. This is a completely bolt on kit with no cutting required to fit under the lower timing cover.

Installation note:

*Use blue lock tight on all threads

*Use the supplied washer for the idler pulley

*Only use the OEM wave washer on the tensioner pulley

*Torque to 45 ft-lb

This replaces OEM part #s 08041-0701 08041-0701A and 13073-V5001

Fits all rb20 rb25 & rb26 engines that use the part #s above

ARP Description 8740 CHROME MOLY:

Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard ARP production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.

Last but not least, the intake and exhaust manifold gaskets. I went with Tomei’s metal exhaust manifold and Cometic’s MLS intake manifold gasket.

Also another thing that was suppose to happen a year ago, media blast the Greddy intake manifold, which it was sent out the other day.

That’s it for now, I’ll be in LA in a couple weeks, so I’m looking forward to getting on the car.