PREORDER - Ultimate IRS - Mazda RX-7 FD3S Tubular Subframe Cradle

***UPDATE 4/28 --- 6 OF 12 SPOTS ARE NOW SOLD***

THIS IS A PRE-ORDER DEPOSIT SPOT FOR RESERVING OUR NEW FD3S TUBULAR SUBFRAME. THIS IS A $200 DEPOSIT TO PUT YOUR NAME ON ONE OF THE FIRST 12 UNITS WE BUILD. THE $200 WILL BE SUBTRACTED OFF THE TOTAL PRICING WHEN YOUR SUBFRAME IS READY TO SHIP.

PLEASE SELECT THE OPTIONS YOU NEED. THIS IS FOR SUBFRAME ONLY, THIS DOES NOT INCLUDE THE DIFFERENTIAL. IF YOU NEED A DIFFERENTIAL SETUP WITH IT, THAT CAN BE ARRANGED, BUT BUY THE DEPOSIT SPOT FIRST TO GET IN LINE.

BARE $4650
BLACK $4850
CUSTOM COLOR $4950

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We are hoping to start on the first production unit in first week of June. This is an estimate, based on when we get all our tubes and tabs made. After we have all materials, it will take a full week for each unit to be produced, so if you are #12 in line there will be a 12 week wait time associated with it.

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This is a complete bolt-in rear tubular subframe for the 1993-1995 Mazda RX-7 (FD3S) chassis. This is 100% chromoly, so it is not only lightweight but extremely strong. The bare stock stamped steel subframe is around 30 lbs, this bare subframe is 10 lbs heavier, weighing it at only 40 lbs. This small 10lb weight gain is a small price to pay for the increase in chassis stability and strength. The stock subframes have been known to tear, especially when upgrading to an 8.8 rear end and welding in bars.

This will make the entire IRS suspension more rigid. Removing the play and twist from IRS suspension systems is key in making it work better.

The subframe cradle uses all the factory mounting locations to the chassis and  stock locations for all suspension arms. This is also designed to work with the factory spindle. You can use all factory control arms other than the lower control arm (that has the eccentric bolt) - this subframe does not use the eccentric bolts, so you will need to have an adjustable arm there to adjust camber.

For the differential, it also uses the stock mounting locations, so you can use stock differential or an aftermarket rear end kit like my 8.8" or 9" kit. For example, you can see my FD3S 9" kit in the pictures.

For guys who already have an 8.8 rear end, this subframe will work with existing Ronin 8.8 customers as well, so if you already have the Ronin kit, you can direct swap out this subframe for your stock modified one. You can then sell your modded 8.8 subframe and recoup some of the costs.