Product review (5 stars): Quality replacement for Norton 501A Igniter; Shorter Ceramic Block
I ordered this to replace the Norton 501A igniter on a DCS RGU-305 oven.

The igniter comes with very long lead wires, so there is plenty of distance to connect the igniter.  The wires do not have any kind of clip connection, just bare ends, and come with electrical screw caps.

One thing I initially wondered about was the fact that the white ceramic block of the igniter terminates flush with the metal housing (the old Norton 501A has a ceramic block that is about an inch longer and sticks out past the back end of the metal housing).  However, this does not seem to be an issue so far in my particular oven, because the shorter ceramic block does manage to reach flush to the outside of the oven chamber (and, therefore, the lead wires are not actually inside the oven chamber itself).

Perhaps the lead wires are rated for full exposure inside the oven chamber, but I would prefer not to take the chance.  They do of course get quite warm just from residual heat exposure, but not nearly as hot as they would be if inside the oven chamber itself.  Anyway, something to consider if the igniter in your particular oven is mounted in such a way that you need a longer ceramic block that sticks past the metal housing.

Otherwise, the igniter is working great as far as ignition goes.  In another week or two of baking I'll know whether it also solved the real problem I was having with my oven (intermittently not reaching full heat, occasional sputtering flame).

---

Update December 2, 2013.  So far the oven is working fine.  We've used it more than a dozen times over the past two weeks since installing the new igniter and the prior problems with intermittent heat and sputtering flame appear to have been solved.